CoOp:Anything

CoOp:Anything is a searchable directory cataloging co-op modifications for single-player games across various engines. Users can search any game to see available co-op mods, check what percentage of gameplay supports multiplayer, and rate mods based on their experience. The platform tracks mod status (active, quiet, stalled), quality tiers, and connection methods. Built with Claude Code, it guides AI agents through researching, reverse-engineering, building, and testing co-op implementations, then packaging them for one-click installation via Steam.