Skill rating

Find every existing co-op attempt for a game, its newest build, its bug reports, and co-op work on other games with the same engine. Use before writing any code.

Reverse engineer a game or its engine to learn how its scripts, netcode, saves and level loading work, using agent tools such as REA, GhidraMCP, ida-pro-mcp, Ghidra headless, Frida and engine dumpers.

Maintainer skill. Review open pull requests and issues for coop-anything, merge good directory and game write-up contributions, and keep the directory consistent.

Get a console game running natively on PC as source code (decompilation, static recompilation or engine reimplementation) so co-op can be added in code, the way Ocarina of Time co-op works on Ship of

Mod Nintendo Switch games for co-op or local wireless on a console: find a game's session code (PIA, nn::ldn) with Ghidra, hook it with exlaunch on Atmosphere, test with ldn_mitm or kinnay/LDN, and us

Make a console game (PS1, PS2, N64, GameCube, Wii, GBA, ...) co-op through emulators: netplay for games with local multiplayer, memory-sync mods between two emulator instances for single-player games,

Build co-op for a single-player game that has no co-op mod: choose a hook point, show the second player as a puppet, pick an authority model, sync world and story state, handle level transitions and s

Choose and implement networking for a co-op mod: sync model, transport library, and a way for friends to connect without port forwarding (Steam Spacewar relay, EOS, VPN), plus wrapping an existing UDP

Finish an existing but buggy, stalled or abandoned co-op mod: get its last build, audit its code by subsystem, fix it as a separate package, and test it with real game clients.

Start here for any game. Identify the exact game build and engine, check the coop-anything directory and existing work, and choose a path: finish an existing co-op mod or build co-op from zero.

Prove co-op works without a human playtest: isolated test installs, a launcher for host plus N real clients, an in-game test bot, shared-state assertions, crash detection, lag and loss runs, and mutat

Build and test co-op sync with the hub's ready-made tools in tools/: an in-game RPC bridge and live inspector, hot reload of the mod core inside running games, a UDP chaos box for lag and loss, a flig

Send what you learned back to coop-anything: update the directory, write up the game, improve the playbook, and open a draft pull request after the owner reviews the diff.