Free tool

Play your favourite single-player game with your friends

Co-op Anything is a free, open-source playbook you point Claude Code at. It fixes an old co-op mod for your game, or builds one if there is none, then tests it with bots. Your friends join over Steam. You do not need to know any code.

Open Co-op Anything on GitHub

The prompt

Open Claude Code and paste this. Put your own game in place of Deus Ex.

Prompt
Read https://github.com/cranebeaker/coop-anything and follow AGENTS.md. I want to play Deus Ex in co-op with my friends.

Already done: Deus Ex

If you want to play Deus Ex with your friends right now, you do not even need the prompt.

  1. 1

    Deus Ex Co-op

    Ready to play

    Get the zip from the Deus Ex Co-op page, run Install.bat, then open "Deus Ex Co-op". The host presses 1, your friends press 2 and join over Steam.

    Open Deus Ex Co-op on GitHub

How to use it for any game

  1. 1

    Open Claude Code

    In the Claude desktop app, switch to Code. Or open Claude Code in your terminal.

  2. 2

    Paste the prompt with your game in it

    Change Deus Ex to the game you want to play with your friends.

  3. 3

    Let it work

    It checks for an old co-op mod and fixes it, or builds a new one, and tests it with bots. It asks before it installs anything.

  4. 4

    Play with your friends

    Your friends join over Steam. Everyone needs their own copy of the game.

Questions people ask

Is Co-op Anything free?

Yes, it is free and open source. You need a Claude plan to use Claude Code, and everyone needs their own copy of the game.

Do I need to know how to code?

No. You paste one prompt into Claude Code and it does the work.

Which games work?

Deus Ex is done. Others are still in progress, so check the game list first. See the game list

How do my friends join?

Over Steam. Each friend needs their own copy of the game.

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Co-op Anything is made by cranebeaker on GitHub. All credit to them. Deus Ex is by Ion Storm and Eidos.

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