The leading open-source Lineage 2 server emulator
- engineered in Java, forged by community.
Supporting 40+ chronicles, from Harbingers of War to the latest, across Main, Classic and Essence lines. Over a decade of relentless development, all in the open.
L2JMobius is a Java project engineered to replicate complex MMORPG mechanics with the depth and precision the community demands. Our team has been shipping continuously since 2013, supporting everything from classic chronicles to the very latest releases.
While the original project foundation remains under the GPLv3 license, all of our original, custom-developed code is released under the MIT License, reflecting our commitment to high-quality, original software that is freely accessible to developers everywhere. Our dream is for L2JMobius to someday be fully MIT, a project free for anyone to build upon without restrictions.
Whether you are a veteran engineer or just beginning, L2JMobius offers a robust, modern framework that grows with you and the community around it.
No other open-source L2 server project supports this breadth.
From classic raids to the newest expansions, Mobius keeps every line maintained and shippable.
Cross-platform, high-performance, and battle-tested. Our codebase follows strict coding standards so contributors can move with confidence.
Set up a working server in minutes. Sensible defaults, clear configuration, and no surprises on first boot.
Tune gameplay, add events, build new features. Mobius is designed to be extended, not just deployed.
More than a decade of continuous improvement. Stability, performance and clean architecture are non-negotiable.
Our north star: a server you can play on, end-to-end. Every change is reviewed with that goal in mind.
Mobius is what it is because of its contributors. Pull requests, bug reports and ideas all shape what ships next.
Subscriptions are what allow L2JMobius to remain a full-time effort instead of a side project.
Your subscription directly funds ongoing development, infrastructure and the work needed to keep every chronicle alive.
Receive fixes and features ahead of public releases, stay a step ahead with a stronger codebase.
Faster answers, deeper troubleshooting, and dedicated attention from the people who wrote the code.
Suggest features, propose improvements, and influence what makes it into the next release.
Subscriber-only forum sections, expert tips and reference material you won't find anywhere else.
Talk to the core team. Get insight into design decisions and what's coming next.
