World of Warcraft
World of Warcraft (PC, 2004) has an open-source reimplementation, azerothcore/azerothcore-wotlk, and 5 other public projects. An agent environment already wraps it.
Data checked 2026-10-13 · unbaked registry
Projects
Complete Open Source and Modular solution for MMO
Mature open-source WotLK server emulator
Progressive Vanilla Core aimed at all versions from 1.2 to 1.12
Progressive vanilla server emulator
World of Warcraft Engine Experiment - a custom opensource client.
Active custom open-source client for 1.12.1/2.4.3/3.3.5a Repo license is MIT with a non-commercial restriction.
A complete World of Warcraft 1.12.1 client, written from scratch in Rust and Bevy
From-scratch Rust/Bevy 1.12.1 client (2026)
This is currently the main dev branch of PseuWoW.
development halted; status unplayable; Can only connect to MaNGOS Servers (FOSS reimplementation of World of Warcraft servers).
A work-in-progress World of Warcraft Reinforcement Learning tool capable of finding optimal control policies for mythic+ speedruns.
WIP (2026-10)
What you need
You need your own copy of the game: these projects ship code only.
Agent environments
More on PC
Found via TrinityCore/TrinityCore, en.wikipedia.org/wiki/List_of_game_engine_recrea, SubmitGame/awesome-decomp-games, osgameclones.com/
GitHub data checked 2026-10-13. Notes are summaries from the research pass; the project pages are the authority.