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Co-op Anything is a compelling attempt to turn game modding from isolated wizardry into an agent-assisted, reusable workflow—but “any game” remains an ambitious promise. Its real value is the shared operational memory around engines, synchronization, testing, and packaging, not a magic button for multiplayer.

• –The MCP server gives agents practical project context through co-op directory search, engine detection, and contribution validation.
• –Its two-track playbook can revive abandoned mods or guide fresh reverse-engineering work across Unity, Unreal, Bethesda, emulators, and proprietary engines.
• –Bot-based testing and Steam relay packaging push the project beyond prompt recipes toward repeatable mod-development infrastructure.
• –The hard problems—network state ownership, scripted events, save compatibility, desyncs, and closed binaries—still demand substantial human judgment and game-specific engineering.
• –A shared directory lets successful fixes compound across projects, making this more interesting as a community knowledge base than as a one-click co-op generator.