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How to scan a game install and plan a mod route with Universal Modder

Find the engine, version and modding route for a game you own before writing any code.

Authorization notice. Universal Modder is dual-use. Only use it on software, sites and systems you own or have explicit permission to test.

Reverse engineering. Recon can point toward decompiling or inspecting game code, so check the game's license and only work on games you own.

Who it is forA PC gamer who wants to mod a game they own and does not yet know its engine, anti-cheat status or the best modding route.

The problemStarting a mod blind wastes time. You need to know whether the game is managed or native, which loaders exist and whether anti-cheat blocks the plan.

The outcomeA fingerprint of the game with ranked modding routes, and a MODDING_PLAN.md file the agent can follow.

What you need first

  • A PC game you own, installed through Steam, Epic or Xbox, or in a folder you can point to
  • Git, Python 3.10 or newer, and ffmpeg
  • uv (recommended) to install the `um` CLI
  • A fal API key from fal.ai/dashboard/keys
  • An AI coding agent such as Claude Code, Codex, Gemini CLI, Cursor or OpenCode, or any agent that can read the skills
  • Blender, only if you want 3D to sprite renders

Steps

  1. Install the CLI: uv tool install git+https://github.com/rehan-remade/universal-modder
  2. Run um scan to find Steam, Epic and Xbox installs and report the engine, version, anti-cheat, installed loaders, save folders and ranked routes.
  3. Run um kb search "<game name>" to check for field notes from earlier mods of the same game. (inferred, check the README)
  4. Open the repo in your agent and ask it to use the game-recon skill on the game you chose, then save the plan as MODDING_PLAN.md.

Prompt for your agent

In the universal-modder repo, use the game-recon skill on the game at <game install path>. Run `um scan` and `um kb search` for it, then write MODDING_PLAN.md with the engine, version, anti-cheat status and the ranked routes. Verify that the plan names the engine and lists at least one route.

Caveat. The README says scan results are fingerprints and ranked routes, so confirm the engine and anti-cheat status yourself before you change any game files.

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