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 late 2009.

OpenRS2 requires version 11 or later of the Java Development Kit.

The JDK is required even if a pre-built copy of OpenRS2 is used, as it depends on JDK-only tools, such as jarsigner, at runtime.

OpenRS2 requires the original RuneScape client code, data and location file encryption keys, which we cannot legally distribute.

These files must be manually placed in the nonfree directory (directly beneath the root of the repository), in the following structure:

nonfree
├── lib
│   ├── jaggl.pack200
│   ├── loader_gl.jar
│   ├── loader.jar
│   ├── runescape_gl.pack200
│   ├── runescape.jar
│   └── unpackclass.pack
└── share
    ├── cache
    │   ├── 0
    │   │   ├── 0.dat
    │   │   └── ...
    │   ├── ...
    │   └── 255
    │       ├── ...
    │       └── 28.dat
    └── keys.json

The CRC-32 checksums and SHA-256 digests of the correct files are:

The .gitignore file includes the nonfree directory to prevent any non-free material from being accidentally included in the repository.

Run ./gradlew to download the dependencies, build the code, run the unit tests and package it.

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OpenRS2 is available under the terms of the ISC license, which is similar to the 2-clause BSD license. The full copyright notice and terms are available in the LICENSE file.