diff --git a/.editorconfig b/.editorconfig
index 74a473cd..899d481a 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -7,7 +7,7 @@ trim_trailing_whitespace = true
 max_line_length = 120
 indent_style = tab
 
-[*.kt]
+[*.{kt,kts}]
 indent_style = space
 indent_size = 4
 # see https://github.com/pinterest/ktlint/issues/527
diff --git a/.gitignore b/.gitignore
index e49a10ea..a56a06e6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,10 +4,12 @@
 !.idea
 !.mailmap
 *.iml
+*/build
+*/out
 */target
 *~
 /nonfree
+/build
+/out
 /target
 hs_err_pid*.log
-pom.xml.releaseBackup
-release.properties
diff --git a/.idea/runConfigurations/AstDeobfuscator.xml b/.idea/runConfigurations/AstDeobfuscator.xml
index 881ecc9d..598fc5fa 100644
--- a/.idea/runConfigurations/AstDeobfuscator.xml
+++ b/.idea/runConfigurations/AstDeobfuscator.xml
@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="AstDeobfuscator" type="JetRunConfigurationType" factoryName="Kotlin">
-    <module name="openrs2-deob-ast" />
+    <module name="openrs2.deob-ast.main" />
     <option name="VM_PARAMETERS" value="" />
     <option name="PROGRAM_PARAMETERS" value="" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
diff --git a/.idea/runConfigurations/Bundler.xml b/.idea/runConfigurations/Bundler.xml
index 7d469a65..435eba25 100644
--- a/.idea/runConfigurations/Bundler.xml
+++ b/.idea/runConfigurations/Bundler.xml
@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="Bundler" type="JetRunConfigurationType" factoryName="Kotlin">
-    <module name="openrs2-bundler" />
+    <module name="openrs2.bundler.main" />
     <option name="VM_PARAMETERS" value="" />
     <option name="PROGRAM_PARAMETERS" value="" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
diff --git a/.idea/runConfigurations/Decompiler.xml b/.idea/runConfigurations/Decompiler.xml
index c776cd88..27f3fe86 100644
--- a/.idea/runConfigurations/Decompiler.xml
+++ b/.idea/runConfigurations/Decompiler.xml
@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="Decompiler" type="JetRunConfigurationType" factoryName="Kotlin">
-    <module name="openrs2-decompiler" />
+    <module name="openrs2.decompiler.main" />
     <option name="VM_PARAMETERS" value="" />
     <option name="PROGRAM_PARAMETERS" value="" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
diff --git a/.idea/runConfigurations/Deobfuscator.xml b/.idea/runConfigurations/Deobfuscator.xml
index a711a1ef..c6fbcd18 100644
--- a/.idea/runConfigurations/Deobfuscator.xml
+++ b/.idea/runConfigurations/Deobfuscator.xml
@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="Deobfuscator" type="JetRunConfigurationType" factoryName="Kotlin">
-    <module name="openrs2-deob" />
+    <module name="openrs2.deob.main" />
     <option name="VM_PARAMETERS" value="" />
     <option name="PROGRAM_PARAMETERS" value="" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
diff --git a/.idea/runConfigurations/GameServer.xml b/.idea/runConfigurations/GameServer.xml
index 38578d37..1e056804 100644
--- a/.idea/runConfigurations/GameServer.xml
+++ b/.idea/runConfigurations/GameServer.xml
@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="GameServer" type="JetRunConfigurationType" factoryName="Kotlin">
-    <module name="openrs2-game" />
+    <module name="openrs2.game.main" />
     <option name="VM_PARAMETERS" value="-Dio.netty.leakDetection.level=PARANOID" />
     <option name="PROGRAM_PARAMETERS" value="" />
     <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
diff --git a/.idea/runConfigurations/client.xml b/.idea/runConfigurations/client.xml
index 38feff88..0c97fc9f 100644
--- a/.idea/runConfigurations/client.xml
+++ b/.idea/runConfigurations/client.xml
@@ -1,7 +1,7 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="client" type="Application" factoryName="Application" nameIsGenerated="true">
     <option name="MAIN_CLASS_NAME" value="client" />
-    <module name="openrs2-client" />
+    <module name="openrs2.nonfree.client.main" />
     <option name="PROGRAM_PARAMETERS" value="1 live english game0" />
     <method v="2">
       <option name="Make" enabled="true" />
diff --git a/README.md b/README.md
index 0d10c3f2..902bbd26 100644
--- a/README.md
+++ b/README.md
@@ -10,10 +10,7 @@ released in late 2009.
 
 ## Prerequisites
 
-Building OpenRS2 requires the following pieces of software:
-
-* [Java Development Kit][jdk] (version 8 or later)
-* [Apache Maven][maven] (version 3.3.9 or later)
+Building OpenRS2 requires version 8 or later of the [Java Development Kit][jdk].
 
 ### Non-free components
 
@@ -50,8 +47,8 @@ non-free material from being accidentally included in the repository.
 
 ## Building
 
-Run `mvn verify` to download the dependencies, build the code, run the unit
-tests and package it.
+Run `./gradlew` to download the dependencies, build the code, run the unit tests
+and package it.
 
 ## Contributing
 
@@ -62,7 +59,7 @@ formatter before each commit. The 'Optimize imports' option should also be
 selected. Do not select 'Rearrange entries'.
 
 OpenRS2's code style settings are held in `.idea/codeStyles/Project.xml` in the
-repository, and IDEA should use them automatically after importing the Maven
+repository, and IDEA should use them automatically after importing the Gradle
 project.
 
 Kotlin code must pass all of [ktlint][ktlint]'s tests.
diff --git a/all/build.gradle.kts b/all/build.gradle.kts
new file mode 100644
index 00000000..8dd61208
--- /dev/null
+++ b/all/build.gradle.kts
@@ -0,0 +1,81 @@
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+import com.github.jk1.license.render.TextReportRenderer
+
+plugins {
+    `maven-publish`
+    application
+    id("com.github.jk1.dependency-license-report")
+    id("com.github.johnrengelman.shadow")
+    kotlin("jvm")
+}
+
+application {
+    applicationName = "openrs2"
+    mainClassName = "dev.openrs2.LauncherKt"
+}
+
+dependencies {
+    implementation(project(":bundler"))
+    implementation(project(":decompiler"))
+    implementation(project(":deob"))
+    implementation(project(":deob-ast"))
+    implementation(project(":game"))
+}
+
+tasks.withType<ShadowJar> {
+    minimize()
+}
+
+licenseReport {
+    renderers = arrayOf(TextReportRenderer())
+}
+
+val distTasks = listOf(
+    "distTar",
+    "distZip",
+    "installDist",
+    "installShadowDist",
+    "shadowDistTar",
+    "shadowDistZip"
+)
+
+configure(tasks.filter { it.name in distTasks }) {
+    dependsOn("generateLicenseReport")
+}
+
+distributions {
+    all {
+        contents {
+            from("${rootProject.projectDir}/COPYING")
+            from("${rootProject.projectDir}/README.md")
+            from("${rootProject.projectDir}/docs") {
+                include("*.md")
+                into("docs")
+            }
+            from("$buildDir/reports/dependency-license/THIRD-PARTY-NOTICES.txt") {
+                rename { "third-party-licenses.txt" }
+                into("docs")
+            }
+        }
+    }
+
+    named("shadow") {
+        distributionBaseName.set("openrs2-shadow")
+    }
+}
+
+publishing {
+    publications.create<MavenPublication>("maven") {
+        artifact(tasks.named("shadowDistZip").get())
+
+        pom {
+            packaging = "zip"
+            name.set("OpenRS2")
+            description.set("""
+                OpenRS2 is an open-source multiplayer game server and suite of
+                associated tools. It is compatible with build 550 of the
+                RuneScape client, which was released in mid-2009.
+            """.trimIndent())
+        }
+    }
+}
diff --git a/all/pom.xml b/all/pom.xml
deleted file mode 100644
index dc422249..00000000
--- a/all/pom.xml
+++ /dev/null
@@ -1,90 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <parent>
-    <groupId>dev.openrs2</groupId>
-    <artifactId>openrs2</artifactId>
-    <version>1.0.0-SNAPSHOT</version>
-  </parent>
-
-  <artifactId>openrs2-all</artifactId>
-  <packaging>jar</packaging>
-
-  <name>OpenRS2 All</name>
-  <description>
-    Zip file for end users, containing OpenRS2, all of its transitive
-    dependencies and launcher scripts.
-  </description>
-
-  <dependencies>
-    <dependency>
-      <groupId>dev.openrs2</groupId>
-      <artifactId>openrs2-decompiler</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>dev.openrs2</groupId>
-      <artifactId>openrs2-deob</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>dev.openrs2</groupId>
-      <artifactId>openrs2-deob-ast</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>dev.openrs2</groupId>
-      <artifactId>openrs2-game</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-  </dependencies>
-
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-shade-plugin</artifactId>
-        <executions>
-          <execution>
-            <phase>package</phase>
-            <goals>
-              <goal>shade</goal>
-            </goals>
-          </execution>
-        </executions>
-        <configuration>
-          <shadedArtifactAttached>true</shadedArtifactAttached>
-          <shadedClassifierName>jar-with-dependencies</shadedClassifierName>
-          <transformers>
-            <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
-              <manifestEntries>
-                <Main-Class>dev.openrs2.game.GameServerKt</Main-Class>
-              </manifestEntries>
-            </transformer>
-            <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
-          </transformers>
-        </configuration>
-      </plugin>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-assembly-plugin</artifactId>
-        <executions>
-          <execution>
-            <id>make-assembly</id>
-            <phase>package</phase>
-            <goals>
-              <goal>single</goal>
-            </goals>
-          </execution>
-        </executions>
-        <configuration>
-          <descriptors>
-            <descriptor>${project.basedir}/src/assembly/bin.xml</descriptor>
-          </descriptors>
-          <appendAssemblyId>false</appendAssemblyId>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-</project>
diff --git a/all/src/assembly/bin.xml b/all/src/assembly/bin.xml
deleted file mode 100644
index a8675507..00000000
--- a/all/src/assembly/bin.xml
+++ /dev/null
@@ -1,30 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<assembly xmlns="http://maven.apache.org/ASSEMBLY/2.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.0.0 http://maven.apache.org/xsd/assembly-2.0.0.xsd">
-  <id>bin</id>
-  <formats>
-    <format>zip</format>
-  </formats>
-  <fileSets>
-    <fileSet>
-      <directory>${project.basedir}/src/bin</directory>
-      <outputDirectory>bin</outputDirectory>
-    </fileSet>
-    <fileSet>
-      <directory>${project.parent.basedir}/docs</directory>
-      <outputDirectory>docs</outputDirectory>
-    </fileSet>
-  </fileSets>
-  <files>
-    <file>
-      <source>${project.build.directory}/${project.artifactId}-${project.version}-jar-with-dependencies.jar</source>
-      <outputDirectory>lib</outputDirectory>
-      <destName>openrs2.jar</destName>
-    </file>
-    <file>
-      <source>${project.parent.basedir}/COPYING</source>
-    </file>
-    <file>
-      <source>${project.parent.basedir}/README.md</source>
-    </file>
-  </files>
-</assembly>
diff --git a/all/src/bin/openrs2-bundle b/all/src/bin/openrs2-bundle
deleted file mode 100755
index 8b679885..00000000
--- a/all/src/bin/openrs2-bundle
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/sh -e
-cd `dirname "$0"`/..
-exec java -cp lib/openrs2.jar dev.openrs2.bundler.BundlerKt "$@"
diff --git a/all/src/bin/openrs2-bundle.cmd b/all/src/bin/openrs2-bundle.cmd
deleted file mode 100644
index 9b15f127..00000000
--- a/all/src/bin/openrs2-bundle.cmd
+++ /dev/null
@@ -1,3 +0,0 @@
-@echo off
-cd /d %~dp0\..
-java -cp lib\openrs2.jar dev.openrs2.bundler.BundlerKt %*
diff --git a/all/src/bin/openrs2-decompiler b/all/src/bin/openrs2-decompiler
deleted file mode 100755
index 3ec9762d..00000000
--- a/all/src/bin/openrs2-decompiler
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/sh -e
-cd `dirname "$0"`/..
-exec java -cp lib/openrs2.jar dev.openrs2.decompiler.DecompilerKt "$@"
diff --git a/all/src/bin/openrs2-decompiler.cmd b/all/src/bin/openrs2-decompiler.cmd
deleted file mode 100644
index 80ff0303..00000000
--- a/all/src/bin/openrs2-decompiler.cmd
+++ /dev/null
@@ -1,3 +0,0 @@
-@echo off
-cd /d %~dp0\..
-java -cp lib\openrs2.jar dev.openrs2.decompiler.DecompilerKt %*
diff --git a/all/src/bin/openrs2-deob b/all/src/bin/openrs2-deob
deleted file mode 100755
index 34eadfce..00000000
--- a/all/src/bin/openrs2-deob
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/sh -e
-cd `dirname "$0"`/..
-exec java -cp lib/openrs2.jar dev.openrs2.deob.DeobfuscatorKt "$@"
diff --git a/all/src/bin/openrs2-deob-ast b/all/src/bin/openrs2-deob-ast
deleted file mode 100755
index e4ca8e99..00000000
--- a/all/src/bin/openrs2-deob-ast
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/sh -e
-cd `dirname "$0"`/..
-exec java -cp lib/openrs2.jar dev.openrs2.deob.ast.AstDeobfuscatorKt "$@"
diff --git a/all/src/bin/openrs2-deob-ast.cmd b/all/src/bin/openrs2-deob-ast.cmd
deleted file mode 100644
index 19eed260..00000000
--- a/all/src/bin/openrs2-deob-ast.cmd
+++ /dev/null
@@ -1,3 +0,0 @@
-@echo off
-cd /d %~dp0\..
-java -cp lib\openrs2.jar dev.openrs2.deob.ast.AstDeobfuscatorKt %*
diff --git a/all/src/bin/openrs2-deob.cmd b/all/src/bin/openrs2-deob.cmd
deleted file mode 100644
index d4b07b4a..00000000
--- a/all/src/bin/openrs2-deob.cmd
+++ /dev/null
@@ -1,3 +0,0 @@
-@echo off
-cd /d %~dp0\..
-java -cp lib\openrs2.jar dev.openrs2.deob.DeobfuscatorKt %*
diff --git a/all/src/bin/openrs2-game b/all/src/bin/openrs2-game
deleted file mode 100755
index 7305adc9..00000000
--- a/all/src/bin/openrs2-game
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/sh -e
-cd `dirname "$0"`/..
-exec java -cp lib/openrs2.jar dev.openrs2.game.GameServerKt "$@"
diff --git a/all/src/bin/openrs2-game.cmd b/all/src/bin/openrs2-game.cmd
deleted file mode 100644
index c33e74d5..00000000
--- a/all/src/bin/openrs2-game.cmd
+++ /dev/null
@@ -1,3 +0,0 @@
-@echo off
-cd /d %~dp0\..
-java -cp lib\openrs2.jar dev.openrs2.game.GameServerKt %*
diff --git a/all/src/main/java/dev/openrs2/Launcher.kt b/all/src/main/java/dev/openrs2/Launcher.kt
new file mode 100644
index 00000000..c8b24dc8
--- /dev/null
+++ b/all/src/main/java/dev/openrs2/Launcher.kt
@@ -0,0 +1,39 @@
+package dev.openrs2
+
+import kotlin.system.exitProcess
+import dev.openrs2.bundler.main as bundlerMain
+import dev.openrs2.decompiler.main as decompilerMain
+import dev.openrs2.deob.ast.main as astDeobfuscatorMain
+import dev.openrs2.deob.main as deobfuscatorMain
+import dev.openrs2.game.main as gameMain
+
+fun main(args: Array<String>) {
+    val command: String
+    val commandArgs: Array<String>
+    if (args.isEmpty()) {
+        command = "game"
+        commandArgs = emptyArray()
+    } else {
+        command = args[0]
+        commandArgs = args.copyOfRange(1, args.size)
+    }
+
+    when (command) {
+        "bundle" -> bundlerMain()
+        "decompile" -> decompilerMain()
+        "deob" -> deobfuscatorMain()
+        "deob-ast" -> astDeobfuscatorMain()
+        "game" -> gameMain()
+        else -> {
+            System.err.println("Usage: openrs2 [<command> [<args>]]")
+            System.err.println()
+            System.err.println("Commands:")
+            System.err.println("  bundle")
+            System.err.println("  decompile")
+            System.err.println("  deob")
+            System.err.println("  deob-ast")
+            System.err.println("  game")
+            exitProcess(1)
+        }
+    }
+}
diff --git a/asm/build.gradle.kts b/asm/build.gradle.kts
new file mode 100644
index 00000000..1420a494
--- /dev/null
+++ b/asm/build.gradle.kts
@@ -0,0 +1,27 @@
+plugins {
+    `maven-publish`
+    kotlin("jvm")
+}
+
+dependencies {
+    api(project(":common"))
+    api("org.ow2.asm:asm:${Versions.asm}")
+    api("org.ow2.asm:asm-commons:${Versions.asm}")
+    api("org.ow2.asm:asm-tree:${Versions.asm}")
+    api("org.ow2.asm:asm-util:${Versions.asm}")
+}
+
+publishing {
+    publications.create<MavenPublication>("maven") {
+        from(components["java"])
+
+        pom {
+            packaging = "jar"
+            name.set("OpenRS2 ASM Utilities")
+            description.set("""
+                Common utility code used for manipulating Java bytecode with
+                the ASM library.
+            """.trimIndent())
+        }
+    }
+}
diff --git a/asm/pom.xml b/asm/pom.xml
deleted file mode 100644
index 53c59ee2..00000000
--- a/asm/pom.xml
+++ /dev/null
@@ -1,43 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <parent>
-    <groupId>dev.openrs2</groupId>
-    <artifactId>openrs2</artifactId>
-    <version>1.0.0-SNAPSHOT</version>
-  </parent>
-
-  <artifactId>openrs2-asm</artifactId>
-  <packaging>jar</packaging>
-
-  <name>OpenRS2 ASM Utilities</name>
-  <description>
-    Common utility code used for manipulating Java bytecode with the ASM
-    library.
-  </description>
-
-  <dependencies>
-    <dependency>
-      <groupId>dev.openrs2</groupId>
-      <artifactId>openrs2-common</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>org.ow2.asm</groupId>
-      <artifactId>asm</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>org.ow2.asm</groupId>
-      <artifactId>asm-commons</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>org.ow2.asm</groupId>
-      <artifactId>asm-tree</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>org.ow2.asm</groupId>
-      <artifactId>asm-util</artifactId>
-    </dependency>
-  </dependencies>
-</project>
diff --git a/build.gradle.kts b/build.gradle.kts
new file mode 100644
index 00000000..95853eb3
--- /dev/null
+++ b/build.gradle.kts
@@ -0,0 +1,203 @@
+import com.github.benmanes.gradle.versions.updates.DependencyUpdatesTask
+import org.jetbrains.kotlin.gradle.plugin.KotlinPluginWrapper
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+defaultTasks("build")
+
+plugins {
+    base
+    id("com.github.ben-manes.versions") version Versions.versionsPlugin
+
+    id("com.github.jk1.dependency-license-report") version Versions.dependencyLicenseReport apply false
+    id("com.github.johnrengelman.shadow") version Versions.shadowPlugin apply false
+    id("org.jmailen.kotlinter") version Versions.kotlinter apply false
+    kotlin("jvm") version Versions.kotlin apply false
+}
+
+allprojects {
+    group = "dev.openrs2"
+    version = "1.0.0-SNAPSHOT"
+
+    repositories {
+        mavenLocal()
+        mavenCentral()
+        maven(url = "https://repo.openrs2.dev/repository/openrs2") {
+            credentials {
+                username = findProperty("repoUsername")?.toString()
+                password = findProperty("repoPassword")?.toString()
+            }
+        }
+        maven(url = "https://repo.openrs2.dev/repository/openrs2-snapshots") {
+            credentials {
+                username = findProperty("repoUsername")?.toString()
+                password = findProperty("repoPassword")?.toString()
+            }
+        }
+        maven(url = "https://dl.bintray.com/michaelbull/maven")
+    }
+
+    plugins.withType<BasePlugin> {
+        configure<BasePluginConvention> {
+            archivesBaseName = "${rootProject.name}-$name"
+        }
+    }
+
+    plugins.withType<ApplicationPlugin> {
+        tasks.named<JavaExec>("run") {
+            workingDir = rootProject.projectDir
+        }
+    }
+
+    plugins.withType<JavaPlugin> {
+        configure<JavaPluginExtension> {
+            withSourcesJar()
+
+            sourceCompatibility = JavaVersion.VERSION_1_8
+            targetCompatibility = JavaVersion.VERSION_1_8
+        }
+    }
+
+    tasks.withType<KotlinCompile> {
+        kotlinOptions.jvmTarget = "1.8"
+    }
+
+    tasks.withType<AbstractArchiveTask> {
+        isPreserveFileTimestamps = false
+        isReproducibleFileOrder = true
+    }
+
+    tasks.withType<Test> {
+        reports {
+            html.isEnabled = false
+            junitXml.isEnabled = true
+        }
+    }
+
+    tasks.withType<JacocoReport> {
+        dependsOn("test")
+
+        reports {
+            csv.isEnabled = false
+            html.isEnabled = false
+            xml.isEnabled = false
+        }
+
+        tasks.named("check") {
+            dependsOn("jacocoTestReport")
+        }
+    }
+}
+
+val Project.free: Boolean
+    get() = name != "nonfree" && parent?.name != "nonfree"
+
+configure(subprojects.filter { it.free }) {
+    apply(plugin = "jacoco")
+
+    plugins.withType<KotlinPluginWrapper> {
+        apply(plugin = "org.jmailen.kotlinter")
+
+        dependencies {
+            val api by configurations
+            api(kotlin("stdlib-jdk8"))
+
+            val implementation by configurations
+            implementation("com.michael-bull.kotlin-inline-logger:kotlin-inline-logger-jvm:${Versions.inlineLogger}")
+
+            val testImplementation by configurations
+            testImplementation(kotlin("test-junit5"))
+        }
+    }
+
+    plugins.withType<JavaPlugin> {
+        dependencies {
+            val testRuntimeOnly by configurations
+            testRuntimeOnly("org.junit.jupiter:junit-jupiter:${Versions.junit}")
+        }
+    }
+
+    plugins.withType<ApplicationPlugin> {
+        dependencies {
+            val runtimeOnly by configurations
+            runtimeOnly("ch.qos.logback:logback-classic:${Versions.logback}")
+        }
+    }
+
+    tasks.withType<Test> {
+        useJUnitPlatform()
+
+        jvmArgs = listOf("-ea", "-Dio.netty.leakDetection.level=PARANOID")
+    }
+
+    plugins.withType<MavenPublishPlugin> {
+        configure<PublishingExtension> {
+            repositories {
+                maven {
+                    url = if (version.toString().endsWith("-SNAPSHOT")) {
+                        uri("https://repo.openrs2.dev/repository/openrs2-snapshots")
+                    } else {
+                        uri("https://repo.openrs2.dev/repository/openrs2")
+                    }
+
+                    credentials {
+                        username = findProperty("repoUsername")?.toString()
+                        password = findProperty("repoPassword")?.toString()
+                    }
+                }
+            }
+
+            publications.withType<MavenPublication> {
+                artifactId = "openrs2-${project.name}"
+
+                pom {
+                    url.set("https://www.openrs2.dev/")
+                    inceptionYear.set("2019")
+
+                    organization {
+                        name.set("OpenRS2 Authors")
+                        url.set("https://www.openrs2.dev/")
+                    }
+
+                    licenses {
+                        license {
+                            if (project.name in listOf("deob-annotations", "jsobject")) {
+                                name.set("GNU Lesser General Public License v3.0 or later")
+                                url.set("https://www.gnu.org/licenses/lgpl-3.0.txt")
+                            } else {
+                                name.set("GNU General Public License v3.0 or later")
+                                url.set("https://www.gnu.org/licenses/gpl-3.0.txt")
+                            }
+                        }
+                    }
+
+                    scm {
+                        connection.set("scm:git:https://git.openrs2.dev/openrs2/openrs2.git")
+                        developerConnection.set("scm:git:git@git.openrs2.dev:openrs2/openrs2.git")
+                        url.set("https://git.openrs2.dev/openrs2/openrs2")
+                    }
+
+                    issueManagement {
+                        system.set("Gitea")
+                        url.set("https://git.openrs2.dev/openrs2/openrs2")
+                    }
+
+                    ciManagement {
+                        system.set("Jenkins")
+                        url.set("https://build.openrs2.dev/job/openrs2/")
+                    }
+                }
+            }
+        }
+    }
+}
+
+val rejectVersionRegex = Regex("(?i)[._-](?:alpha|beta|rc|cr|m)")
+
+tasks.withType<DependencyUpdatesTask> {
+    gradleReleaseChannel = "current"
+    revision = "release"
+
+    rejectVersionIf {
+        candidate.version.contains(rejectVersionRegex)
+    }
+}
diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
new file mode 100644
index 00000000..1a373372
--- /dev/null
+++ b/buildSrc/build.gradle.kts
@@ -0,0 +1,7 @@
+plugins {
+    `embedded-kotlin`
+}
+
+repositories {
+    mavenCentral()
+}
diff --git a/buildSrc/settings.gradle.kts b/buildSrc/settings.gradle.kts
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/buildSrc/settings.gradle.kts
@@ -0,0 +1 @@
+
diff --git a/buildSrc/src/main/java/Versions.kt b/buildSrc/src/main/java/Versions.kt
new file mode 100644
index 00000000..b9a3042c
--- /dev/null
+++ b/buildSrc/src/main/java/Versions.kt
@@ -0,0 +1,19 @@
+object Versions {
+    const val asm = "7.3.1"
+    const val bouncyCastle = "1.64"
+    const val dependencyLicenseReport = "1.13"
+    const val fernflower = "1.0.3"
+    const val guava = "28.2-jre"
+    const val guice = "4.2.2"
+    const val inlineLogger = "1.0.1"
+    const val javaParser = "3.15.11"
+    const val jimfs = "1.1"
+    const val junit = "5.6.0"
+    const val kotlin = "1.3.61"
+    const val kotlinter = "2.3.0"
+    const val logback = "1.2.3"
+    const val netty = "4.1.45.Final"
+    const val openrs2Natives = "2.0.0"
+    const val shadowPlugin = "5.2.0"
+    const val versionsPlugin = "0.27.0"
+}
diff --git a/bundler/build.gradle.kts b/bundler/build.gradle.kts
new file mode 100644
index 00000000..a3b09ffb
--- /dev/null
+++ b/bundler/build.gradle.kts
@@ -0,0 +1,30 @@
+plugins {
+    `maven-publish`
+    application
+    kotlin("jvm")
+}
+
+application {
+    mainClassName = "dev.openrs2.bundler.BundlerKt"
+}
+
+dependencies {
+    api(project(":asm"))
+
+    implementation("dev.openrs2:openrs2-natives-all:${Versions.openrs2Natives}")
+}
+
+publishing {
+    publications.create<MavenPublication>("maven") {
+        from(components["java"])
+
+        pom {
+            packaging = "jar"
+            name.set("OpenRS2 Bundler")
+            description.set("""
+                A tool for patching the RuneScape client to allow it to connect
+                to an OpenRS2 server and improve compatibility with modern JVMs.
+            """.trimIndent())
+        }
+    }
+}
diff --git a/bundler/pom.xml b/bundler/pom.xml
deleted file mode 100644
index 8a6e6b03..00000000
--- a/bundler/pom.xml
+++ /dev/null
@@ -1,35 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <parent>
-    <groupId>dev.openrs2</groupId>
-    <artifactId>openrs2</artifactId>
-    <version>1.0.0-SNAPSHOT</version>
-  </parent>
-
-  <artifactId>openrs2-bundler</artifactId>
-  <packaging>jar</packaging>
-
-  <name>OpenRS2 Bundler</name>
-  <description>
-    A tool for patching the RuneScape client to allow it to connect to an
-    OpenRS2 server and improve compatibility with modern JVMs.
-  </description>
-
-  <dependencies>
-    <dependency>
-      <groupId>dev.openrs2</groupId>
-      <artifactId>openrs2-asm</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>ch.qos.logback</groupId>
-      <artifactId>logback-classic</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>dev.openrs2</groupId>
-      <artifactId>openrs2-natives-all</artifactId>
-    </dependency>
-  </dependencies>
-</project>
diff --git a/common/build.gradle.kts b/common/build.gradle.kts
new file mode 100644
index 00000000..67be0e7b
--- /dev/null
+++ b/common/build.gradle.kts
@@ -0,0 +1,26 @@
+plugins {
+    `maven-publish`
+    kotlin("jvm")
+}
+
+dependencies {
+    api("com.google.inject:guice:${Versions.guice}")
+    api("io.netty:netty-buffer:${Versions.netty}")
+    api("org.bouncycastle:bcprov-jdk15on:${Versions.bouncyCastle}")
+
+    testImplementation("com.google.jimfs:jimfs:${Versions.jimfs}")
+}
+
+publishing {
+    publications.create<MavenPublication>("maven") {
+        from(components["java"])
+
+        pom {
+            packaging = "jar"
+            name.set("OpenRS2 Common")
+            description.set("""
+                Common code used by all modules.
+            """.trimIndent())
+        }
+    }
+}
diff --git a/common/pom.xml b/common/pom.xml
deleted file mode 100644
index 6624d84e..00000000
--- a/common/pom.xml
+++ /dev/null
@@ -1,59 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <parent>
-    <groupId>dev.openrs2</groupId>
-    <artifactId>openrs2</artifactId>
-    <version>1.0.0-SNAPSHOT</version>
-  </parent>
-
-  <artifactId>openrs2-common</artifactId>
-  <packaging>jar</packaging>
-
-  <name>OpenRS2 Common</name>
-  <description>Common code used by all modules.</description>
-
-  <dependencies>
-    <dependency>
-      <groupId>com.google.guava</groupId>
-      <artifactId>guava</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>com.google.inject</groupId>
-      <artifactId>guice</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>com.google.jimfs</groupId>
-      <artifactId>jimfs</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>com.michael-bull.kotlin-inline-logger</groupId>
-      <artifactId>kotlin-inline-logger-jvm</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>io.netty</groupId>
-      <artifactId>netty-buffer</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>org.bouncycastle</groupId>
-      <artifactId>bcprov-jdk15on</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>org.slf4j</groupId>
-      <artifactId>slf4j-api</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>org.jetbrains.kotlin</groupId>
-      <artifactId>kotlin-stdlib-jdk8</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>org.jetbrains.kotlin</groupId>
-      <artifactId>kotlin-test-junit5</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter</artifactId>
-    </dependency>
-  </dependencies>
-</project>
diff --git a/decompiler/build.gradle.kts b/decompiler/build.gradle.kts
new file mode 100644
index 00000000..01477b80
--- /dev/null
+++ b/decompiler/build.gradle.kts
@@ -0,0 +1,30 @@
+plugins {
+    `maven-publish`
+    application
+    kotlin("jvm")
+}
+
+application {
+    mainClassName = "dev.openrs2.decompiler.DecompilerKt"
+}
+
+dependencies {
+    implementation(project(":common"))
+    implementation("dev.openrs2:fernflower:${Versions.fernflower}")
+}
+
+publishing {
+    publications.create<MavenPublication>("maven") {
+        from(components["java"])
+
+        pom {
+            packaging = "jar"
+            name.set("OpenRS2 Decompiler")
+            description.set("""
+                A thin wrapper around OpenRS2's fork of Fernflower that sets
+                the standard options required to decompile the RuneScape client
+                and its dependencies.
+            """.trimIndent())
+        }
+    }
+}
diff --git a/decompiler/pom.xml b/decompiler/pom.xml
deleted file mode 100644
index 538b9b63..00000000
--- a/decompiler/pom.xml
+++ /dev/null
@@ -1,35 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <parent>
-    <groupId>dev.openrs2</groupId>
-    <artifactId>openrs2</artifactId>
-    <version>1.0.0-SNAPSHOT</version>
-  </parent>
-
-  <artifactId>openrs2-decompiler</artifactId>
-  <packaging>jar</packaging>
-
-  <name>OpenRS2 Decompiler</name>
-  <description>
-    A thin wrapper around OpenRS2's fork of Fernflower that sets the standard
-    options required to decompile the RuneScape client and its dependencies.
-  </description>
-
-  <dependencies>
-    <dependency>
-      <groupId>dev.openrs2</groupId>
-      <artifactId>openrs2-common</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>ch.qos.logback</groupId>
-      <artifactId>logback-classic</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>dev.openrs2</groupId>
-      <artifactId>fernflower</artifactId>
-    </dependency>
-  </dependencies>
-</project>
diff --git a/deob-annotations/build.gradle.kts b/deob-annotations/build.gradle.kts
new file mode 100644
index 00000000..2e5b4008
--- /dev/null
+++ b/deob-annotations/build.gradle.kts
@@ -0,0 +1,21 @@
+plugins {
+    `java-library`
+    `maven-publish`
+}
+
+// XXX(gpe): this module MUST NOT depend on any of the GPLed modules.
+
+publishing {
+    publications.create<MavenPublication>("maven") {
+        from(components["java"])
+
+        pom {
+            packaging = "jar"
+            name.set("OpenRS2 Deobfuscator Annotations")
+            description.set("""
+                Annotations inserted by the deobfuscator to track the original
+                names and descriptors of classes, methods and fields.
+            """.trimIndent())
+        }
+    }
+}
diff --git a/deob-annotations/pom.xml b/deob-annotations/pom.xml
deleted file mode 100644
index 5edbac7a..00000000
--- a/deob-annotations/pom.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <parent>
-    <groupId>dev.openrs2</groupId>
-    <artifactId>openrs2</artifactId>
-    <version>1.0.0-SNAPSHOT</version>
-  </parent>
-
-  <artifactId>openrs2-deob-annotations</artifactId>
-  <packaging>jar</packaging>
-
-  <name>OpenRS2 Deobfuscator Annotations</name>
-  <description>
-    Annotations inserted by the deobfuscator to track the original names and
-    descriptors of classes, methods and fields.
-  </description>
-  <licenses>
-    <license>
-      <name>GNU Lesser General Public License v3.0 or later</name>
-      <url>https://www.gnu.org/licenses/lgpl-3.0.txt</url>
-    </license>
-  </licenses>
-  <!-- XXX(gpe): this module MUST NOT depend on any of the GPLed modules. -->
-</project>
diff --git a/deob-ast/build.gradle.kts b/deob-ast/build.gradle.kts
new file mode 100644
index 00000000..9ead2df8
--- /dev/null
+++ b/deob-ast/build.gradle.kts
@@ -0,0 +1,29 @@
+plugins {
+    `maven-publish`
+    application
+    kotlin("jvm")
+}
+
+application {
+    mainClassName = "dev.openrs2.deob.ast.AstDeobfuscatorKt"
+}
+
+dependencies {
+    implementation(project(":common"))
+    implementation("com.github.javaparser:javaparser-symbol-solver-core:${Versions.javaParser}")
+}
+
+publishing {
+    publications.create<MavenPublication>("maven") {
+        from(components["java"])
+
+        pom {
+            packaging = "jar"
+            name.set("OpenRS2 AST Deobfuscator")
+            description.set("""
+                A tool for performing AST-level deobfuscation of the RuneScape client. It
+                may be run after decompiling the client.
+            """.trimIndent())
+        }
+    }
+}
diff --git a/deob-ast/pom.xml b/deob-ast/pom.xml
deleted file mode 100644
index 5c04f2c9..00000000
--- a/deob-ast/pom.xml
+++ /dev/null
@@ -1,35 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <parent>
-    <groupId>dev.openrs2</groupId>
-    <artifactId>openrs2</artifactId>
-    <version>1.0.0-SNAPSHOT</version>
-  </parent>
-
-  <artifactId>openrs2-deob-ast</artifactId>
-  <packaging>jar</packaging>
-
-  <name>OpenRS2 AST Deobfuscator</name>
-  <description>
-    A tool for performing AST-level deobfuscation of the RuneScape client. It
-    may be run after decompiling the client.
-  </description>
-
-  <dependencies>
-    <dependency>
-      <groupId>${project.groupId}</groupId>
-      <artifactId>openrs2-common</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>ch.qos.logback</groupId>
-      <artifactId>logback-classic</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>com.github.javaparser</groupId>
-      <artifactId>javaparser-symbol-solver-core</artifactId>
-    </dependency>
-  </dependencies>
-</project>
diff --git a/deob/build.gradle.kts b/deob/build.gradle.kts
new file mode 100644
index 00000000..fd6df4b9
--- /dev/null
+++ b/deob/build.gradle.kts
@@ -0,0 +1,32 @@
+plugins {
+    `maven-publish`
+    application
+    kotlin("jvm")
+}
+
+application {
+    mainClassName = "dev.openrs2.deob.DeobfuscatorKt"
+}
+
+dependencies {
+    implementation(project(":bundler"))
+    implementation(project(":deob-annotations"))
+    implementation("com.google.guava:guava:${Versions.guava}")
+}
+
+publishing {
+    publications.create<MavenPublication>("maven") {
+        from(components["java"])
+
+        pom {
+            packaging = "jar"
+            name.set("OpenRS2 Bytecode Deobfuscator")
+            description.set("""
+                A tool for performing bytecode-level deobfuscation of the
+                RuneScape client. It must be run before decompiling the
+                client - some of the transformations it performs are required
+                for the decompiler to produce valid output.
+            """.trimIndent())
+        }
+    }
+}
diff --git a/deob/pom.xml b/deob/pom.xml
deleted file mode 100644
index d8dd1abe..00000000
--- a/deob/pom.xml
+++ /dev/null
@@ -1,42 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <parent>
-    <groupId>dev.openrs2</groupId>
-    <artifactId>openrs2</artifactId>
-    <version>1.0.0-SNAPSHOT</version>
-  </parent>
-
-  <artifactId>openrs2-deob</artifactId>
-  <packaging>jar</packaging>
-
-  <name>OpenRS2 Bytecode Deobfuscator</name>
-  <description>
-    A tool for performing bytecode-level deobfuscation of the RuneScape client.
-    It must be run before decompiling the client - some of the transformations
-    it performs are required for the decompiler to produce valid output.
-  </description>
-
-  <dependencies>
-    <dependency>
-      <groupId>dev.openrs2</groupId>
-      <artifactId>openrs2-asm</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>dev.openrs2</groupId>
-      <artifactId>openrs2-bundler</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>dev.openrs2</groupId>
-      <artifactId>openrs2-deob-annotations</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>ch.qos.logback</groupId>
-      <artifactId>logback-classic</artifactId>
-    </dependency>
-  </dependencies>
-</project>
diff --git a/docs/faq.md b/docs/faq.md
index dbebee09..f3cbef9e 100644
--- a/docs/faq.md
+++ b/docs/faq.md
@@ -12,23 +12,11 @@ A mixture of reasons:
 * Availability of the complete set of original client data files.
 * Availability of a large proportion of the location file encryption keys.
 
-## Why does OpenRS2 use Maven instead of Gradle?
+## Why do the OpenRS2 Natives use Maven instead of Gradle?
 
-Gradle's task-based model is significantly better than Maven's fixed lifecycle
-model.
-
-However, Gradle's flexibility and rate of development has come at a cost of
-worse IDE integration, to the point at which recent versions of IntelliJ IDEA
-now delegate build actions to Gradle by default rather than attempting to
-understand the project structure. This tends to be slower and consume more
-memory than IDEA's built-in build system. While this setting can be changed, I
-think it is a sign of the future of Gradle's IDE integration.
-
-Furthermore, [nar-maven-plugin][nar-maven-plugin] is, at the time of writing,
-significantly better than Gradle's support for building native code. Gradle's
-new C++ plugin simply doesn't provide enough features.
-
-This might be a decision we revisit in the future.
+[nar-maven-plugin][nar-maven-plugin] is, at the time of writing, significantly
+better than Gradle's support for building native code. Gradle's new C++ plugin
+simply doesn't provide enough features.
 
 ## Why is OpenRS2 licensed under the GNU GPL?
 
diff --git a/game/build.gradle.kts b/game/build.gradle.kts
new file mode 100644
index 00000000..a149facc
--- /dev/null
+++ b/game/build.gradle.kts
@@ -0,0 +1,27 @@
+plugins {
+    `maven-publish`
+    application
+    kotlin("jvm")
+}
+
+application {
+    mainClassName = "dev.openrs2.game.GameServerKt"
+}
+
+dependencies {
+    implementation(project(":common"))
+}
+
+publishing {
+    publications.create<MavenPublication>("maven") {
+        from(components["java"])
+
+        pom {
+            packaging = "jar"
+            name.set("OpenRS2 Game Server")
+            description.set("""
+                Reimplementation of the RuneScape game server software.
+            """.trimIndent())
+        }
+    }
+}
diff --git a/game/pom.xml b/game/pom.xml
deleted file mode 100644
index e8be01d7..00000000
--- a/game/pom.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <parent>
-    <groupId>dev.openrs2</groupId>
-    <artifactId>openrs2</artifactId>
-    <version>1.0.0-SNAPSHOT</version>
-  </parent>
-
-  <artifactId>openrs2-game</artifactId>
-  <packaging>jar</packaging>
-
-  <name>OpenRS2 Game Server</name>
-  <description>
-    Reimplementation of the RuneScape game server software.
-  </description>
-
-  <dependencies>
-    <dependency>
-      <groupId>${project.groupId}</groupId>
-      <artifactId>openrs2-common</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-  </dependencies>
-</project>
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 00000000..7fc6f1ff
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1 @@
+kotlin.code.style=official
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..f3d88b1c
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..4e1cc9db
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 00000000..2fe81a7d
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,183 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 00000000..9618d8d9
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/jsobject/build.gradle.kts b/jsobject/build.gradle.kts
new file mode 100644
index 00000000..c5d654ff
--- /dev/null
+++ b/jsobject/build.gradle.kts
@@ -0,0 +1,20 @@
+plugins {
+    `java-library`
+    `maven-publish`
+}
+
+// XXX(gpe): this module MUST NOT depend on any of the GPLed modules.
+
+publishing {
+    publications.create<MavenPublication>("maven") {
+        from(components["java"])
+
+        pom {
+            packaging = "jar"
+            name.set("OpenRS2 JavaScript Object")
+            description.set("""
+                Stubs for the netscape.javascript package.
+            """.trimIndent())
+        }
+    }
+}
diff --git a/jsobject/pom.xml b/jsobject/pom.xml
deleted file mode 100644
index d28ec7a2..00000000
--- a/jsobject/pom.xml
+++ /dev/null
@@ -1,23 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <parent>
-    <groupId>dev.openrs2</groupId>
-    <artifactId>openrs2</artifactId>
-    <version>1.0.0-SNAPSHOT</version>
-  </parent>
-
-  <artifactId>openrs2-jsobject</artifactId>
-  <packaging>jar</packaging>
-
-  <name>OpenRS2 JavaScript Object</name>
-  <description>Stubs for the netscape.javascript package.</description>
-  <licenses>
-    <license>
-      <name>GNU Lesser General Public License v3.0 or later</name>
-      <url>https://www.gnu.org/licenses/lgpl-3.0.txt</url>
-    </license>
-  </licenses>
-  <!-- XXX(gpe): this module MUST NOT depend on any of the GPLed modules. -->
-</project>
diff --git a/pom.xml b/pom.xml
deleted file mode 100644
index 616dcea3..00000000
--- a/pom.xml
+++ /dev/null
@@ -1,241 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <parent>
-    <groupId>dev.openrs2</groupId>
-    <artifactId>openrs2-parent</artifactId>
-    <version>1.0.8</version>
-  </parent>
-
-  <artifactId>openrs2</artifactId>
-  <version>1.0.0-SNAPSHOT</version>
-  <packaging>pom</packaging>
-
-  <name>OpenRS2</name>
-  <description>
-    OpenRS2 is an open-source multiplayer game server and suite of associated
-    tools. It is compatible with build 550 of the RuneScape client, which was
-    released in mid-2009.
-  </description>
-
-  <modules>
-    <module>all</module>
-    <module>asm</module>
-    <module>bundler</module>
-    <module>common</module>
-    <module>decompiler</module>
-    <module>deob-annotations</module>
-    <module>deob-ast</module>
-    <module>deob</module>
-    <module>game</module>
-    <module>jsobject</module>
-  </modules>
-
-  <scm>
-    <connection>scm:git:https://git.openrs2.dev/openrs2/openrs2.git</connection>
-    <developerConnection>scm:git:git@git.openrs2.dev:openrs2/openrs2.git</developerConnection>
-    <url>https://git.openrs2.dev/openrs2/openrs2</url>
-  </scm>
-  <issueManagement>
-    <system>Gitea</system>
-    <url>https://git.openrs2.dev/openrs2/openrs2/issues</url>
-  </issueManagement>
-  <ciManagement>
-    <system>Jenkins</system>
-    <url>https://build.openrs2.dev/job/openrs2/</url>
-  </ciManagement>
-
-  <dependencyManagement>
-    <dependencies>
-      <dependency>
-        <groupId>ch.qos.logback</groupId>
-        <artifactId>logback-classic</artifactId>
-        <version>1.2.3</version>
-      </dependency>
-      <dependency>
-        <groupId>com.google.guava</groupId>
-        <artifactId>guava</artifactId>
-        <version>28.2-jre</version>
-      </dependency>
-      <dependency>
-        <groupId>com.google.inject</groupId>
-        <artifactId>guice</artifactId>
-        <version>4.2.2</version>
-      </dependency>
-      <dependency>
-        <groupId>com.google.jimfs</groupId>
-        <artifactId>jimfs</artifactId>
-        <version>1.1</version>
-        <scope>test</scope>
-      </dependency>
-      <dependency>
-        <groupId>com.github.javaparser</groupId>
-        <artifactId>javaparser-symbol-solver-core</artifactId>
-        <version>3.15.11</version>
-      </dependency>
-      <dependency>
-        <groupId>com.michael-bull.kotlin-inline-logger</groupId>
-        <artifactId>kotlin-inline-logger-jvm</artifactId>
-        <version>1.0.1</version>
-      </dependency>
-      <dependency>
-        <groupId>dev.openrs2</groupId>
-        <artifactId>fernflower</artifactId>
-        <version>1.0.3</version>
-      </dependency>
-      <dependency>
-        <groupId>dev.openrs2</groupId>
-        <artifactId>openrs2-natives-all</artifactId>
-        <version>2.0.0</version>
-      </dependency>
-      <dependency>
-        <groupId>io.netty</groupId>
-        <artifactId>netty-buffer</artifactId>
-        <version>4.1.45.Final</version>
-      </dependency>
-      <dependency>
-        <groupId>org.bouncycastle</groupId>
-        <artifactId>bcprov-jdk15on</artifactId>
-        <version>1.64</version>
-      </dependency>
-      <dependency>
-        <groupId>org.ow2.asm</groupId>
-        <artifactId>asm</artifactId>
-        <version>7.3.1</version>
-      </dependency>
-      <dependency>
-        <groupId>org.ow2.asm</groupId>
-        <artifactId>asm-commons</artifactId>
-        <version>7.3.1</version>
-      </dependency>
-      <dependency>
-        <groupId>org.ow2.asm</groupId>
-        <artifactId>asm-tree</artifactId>
-        <version>7.3.1</version>
-      </dependency>
-      <dependency>
-        <groupId>org.ow2.asm</groupId>
-        <artifactId>asm-util</artifactId>
-        <version>7.3.1</version>
-      </dependency>
-      <dependency>
-        <groupId>org.slf4j</groupId>
-        <artifactId>slf4j-api</artifactId>
-        <version>1.7.30</version>
-      </dependency>
-      <dependency>
-        <groupId>org.junit.jupiter</groupId>
-        <artifactId>junit-jupiter</artifactId>
-        <version>5.6.0</version>
-        <scope>test</scope>
-      </dependency>
-      <dependency>
-        <groupId>org.junit.jupiter</groupId>
-        <artifactId>junit-jupiter-api</artifactId>
-        <version>5.6.0</version>
-        <scope>test</scope>
-      </dependency>
-    </dependencies>
-  </dependencyManagement>
-
-  <repositories>
-    <repository>
-      <id>openrs2</id>
-      <name>OpenRS2</name>
-      <url>https://repo.openrs2.dev/repository/openrs2/</url>
-      <releases>
-        <enabled>true</enabled>
-        <updatePolicy>never</updatePolicy>
-      </releases>
-      <snapshots>
-        <enabled>false</enabled>
-      </snapshots>
-    </repository>
-    <repository>
-      <id>openrs2-snapshots</id>
-      <name>OpenRS2 Snapshots</name>
-      <url>https://repo.openrs2.dev/repository/openrs2-snapshots/</url>
-      <releases>
-        <enabled>false</enabled>
-      </releases>
-      <snapshots>
-        <enabled>true</enabled>
-      </snapshots>
-    </repository>
-  </repositories>
-
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-surefire-plugin</artifactId>
-        <configuration>
-          <argLine>@{argLine} -ea -Dio.netty.leakDetection.level=PARANOID</argLine>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-
-  <reporting>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-javadoc-plugin</artifactId>
-        <configuration>
-          <detectJavaApiLink>true</detectJavaApiLink>
-          <detectLinks>true</detectLinks>
-          <show>private</show>
-        </configuration>
-        <reportSets>
-          <reportSet>
-            <id>aggregate</id>
-            <inherited>false</inherited>
-            <reports>
-              <report>aggregate</report>
-            </reports>
-          </reportSet>
-          <reportSet>
-            <id>default</id>
-            <reports>
-              <report>javadoc</report>
-            </reports>
-          </reportSet>
-        </reportSets>
-      </plugin>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-jxr-plugin</artifactId>
-        <reportSets>
-          <reportSet>
-            <id>aggregate</id>
-            <inherited>false</inherited>
-            <reports>
-              <report>aggregate</report>
-            </reports>
-          </reportSet>
-          <reportSet>
-            <id>default</id>
-            <reports>
-              <report>jxr</report>
-            </reports>
-          </reportSet>
-        </reportSets>
-      </plugin>
-    </plugins>
-  </reporting>
-
-  <profiles>
-    <profile>
-      <id>nonfree</id>
-      <activation>
-        <file>
-          <exists>nonfree/pom.xml</exists>
-        </file>
-      </activation>
-      <modules>
-        <module>nonfree</module>
-      </modules>
-    </profile>
-  </profiles>
-</project>
diff --git a/settings.gradle.kts b/settings.gradle.kts
new file mode 100644
index 00000000..a7a888e5
--- /dev/null
+++ b/settings.gradle.kts
@@ -0,0 +1,29 @@
+import java.nio.file.Files
+
+rootProject.name = "openrs2"
+
+include(
+    "all",
+    "asm",
+    "bundler",
+    "common",
+    "decompiler",
+    "deob",
+    "deob-annotations",
+    "deob-ast",
+    "game",
+    "jsobject"
+)
+
+if (Files.exists(rootProject.projectDir.toPath().resolve("nonfree/build.gradle.kts"))) {
+    include(
+        "nonfree",
+        "nonfree:client",
+        "nonfree:gl",
+        "nonfree:gl-dri",
+        "nonfree:loader",
+        "nonfree:signlink",
+        "nonfree:unpack",
+        "nonfree:unpacker"
+    )
+}