DEDUPEDAuthorization notice. universal-modder is dual-use. Only use it on software, sites and systems you own or have explicit permission to test.
Who it is forFan with a mashup idea, such as a Warthog from Halo driving around Minecraft
The problemCombining two games means extracting assets from one and wiring them into the other's engine, a project few people finish alone.
The outcomeA playable mashup mod where content from game A runs inside game B, with a showcase video.
What you need first
- A coding agent such as Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot or OpenCode
- A PC game you own, run single-player or offline
- Git, Python 3.10+ and ffmpeg (uv recommended)
- A fal API key for generated art, 3D and audio (or a local ComfyUI server for images)
- Blender for 3D to sprite renders
- Windows games run natively or from WSL
Steps
- Install the plugin and set up your fal key for any new art or audio.
- Describe the mashup to the agent, naming both games and the one thing to bring over first.
- Let the mashup-mods skill pick an approach: content port, passthrough mod, or reimplementation.
- Build and verify one working slice in the running game before adding more.
Prompt for your agent
Use universal-modder's mashup-mods skill to bring <thing from game A> into <game B> installed at <path>. Start with one working slice and show me a screenshot from the running game as proof.
Caveat. Mashups reuse other studios' assets; the README's contribution rules forbid sharing game files or decompiled dumps, so publish only your own code and generated art.
About universal-modder
Skills that let a coding agent mod almost any PC game you own. Part of this week's top 10 repos: ranked #7 on Repo Radar. View rehan-remade/universal-modder on GitHub.
More with universal-modder
- Turn a finished mod into a reusable field note Record the engine, route, versions and gotchas of your mod and open a pull request so the next agent starts ahead.
- Add a custom weapon or boss to a game you own Describe a new item or boss in plain words and have the agent build it, with art, and test it in the running game.
- Cut a showcase video of your finished mod Record the game window with only game audio, pick the best moments and edit a styled clip.
- Find a game's engine and see if it was modded before Point the agent at a game folder to get the engine, version, modding route and any existing field notes.
- Make sprites, 3D models and sound for a mod with fal Generate engine-ready sprites, 3D models, sound effects and music for a mod instead of drawing them by hand.
- Port an existing mod to a newer game version or loader Move a mod from an old Minecraft version or loader to a new one without behavior drifting.
- Reverse engineer an unknown game file format Have the agent decode a proprietary asset or save format and prove it with a round trip.
Disclaimer
Deduped lists open-source repositories that belong to other people. We do not own, maintain, audit, or vouch for any of them, and a repo appearing here is not an endorsement or a safety check. The use cases, steps, and prompts are written by AI and may be incomplete, outdated, or just wrong. Where a use case is marked "Seen in the wild", we link to public posts where someone described something similar, but we have not verified those posts and the use case itself is still our AI's own write-up. Use all of this at your own risk. Only run code, commands, or agents on systems and accounts you are authorized to use, and read the code and every command before you run it, especially anything that touches credentials, files, or the network. Nothing here is professional, security, legal, or financial advice. All trademarks and project names belong to their respective owners, and their use here does not imply affiliation. Content is provided as is, without warranties of any kind. Found a mistake, a safety problem, or something you want removed? Email [email protected] and we will look at it promptly. Full disclaimer page