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Guide·7 min read·Claude Code·Codex·Universal Modder·SkyCraft

Play the Viral Game Mashups, Then Build Your Own With AI

Skate through MW2 maps. Put Minecraft blocks in Skyrim. Here are the project links from the video, what you can download, and prompts to get your coding agent working on your own crossover.

Start here: the project links

Pick the crossover you want to try. The MW2 mashup and SkyCraft have downloadable builds. The GTA project is source code with build instructions.

Checked October 4, 2026 against the project READMEs and releases. Instructions are based on maintainer documentation, not a local playtest. Game files and licenses are not included.

Play Skate 3 on MW2 maps, or use MW2 guns in Minecraft

The 2010 Rust Rewrite Mashup combines MW2 with skating and a Minecraft world in a standalone runtime.

  1. Open Releases. Download 2010-Rust-Rewrite-Mashup-windows-x64.zip under Assets. The checked release is v0.4.0.
  2. Extract it into a writable folder outside Program Files.
  3. Run iw4l.exe and select your installed MW2 (2009) folder. The maintainer has tested the Steam version.
  4. For skating, choose Yes when asked about Skate 3. Select the extracted default.xex from your own Xbox 360 Skate 3 copy, with its data folder. Connect a controller.
  5. Load a map and press J, or click both controller sticks, to enter Skate 3 mode.
  6. For the Minecraft world, open Create Game → Minecraft → overworld, or run Minecraft World.bat.

The first Minecraft-world launch downloads about 125 MB from Mojang. Skating is optional. The README lists an invisible skateboard on some maps as a known issue.

Give your agent the MW2 setup job

Open your coding agent on the PC with your games installed. Paste this and provide the real paths it asks for.

Copy-paste this
Help me set up https://github.com/chasmlol/2010-rust-rewrite-mashup on this Windows PC. Read the current README and latest release first. Locate my MW2 (2009) installation. I own Skate 3 for Xbox 360; ask me for my extracted default.xex and data folder if you cannot find them. Explain missing requirements. Use the official Windows release in a separate writable folder. Back up saves before changing them. Set up Skate mode and the Minecraft overworld. Use my own game files, without bypassing ownership checks. Ask before launching the game or controlling my input. Report what you verified and what remains untested.

Play Minecraft inside Skyrim with SkyCraft

SkyCraft runs Minecraft beside Skyrim. Minecraft supplies movement, inventory, blocks and combat while Skyrim supplies its world and NPCs. It is experimental.

You need: Skyrim Special Edition with an Anniversary Edition runtime supported by the project, matching SKSE64, the Anniversary Edition Address Library from Nexus Mods, and an account that owns Minecraft Java Edition. The README lists testing on Skyrim 1.7.104 and excludes SE 1.5.97 and VR. Check your exact version.

  1. Back up your saves. Download SkyCraft-0.1.2.zip, or the current main SkyCraft ZIP, from Releases. The pdb ZIP contains debugging symbols, not the normal install.
  2. Install the main ZIP with Mod Organizer 2 or Vortex.
  3. Launch Skyrim through SKSE.
  4. On first launch, sign in to the bundled Prism Launcher with your Minecraft-owning Microsoft account. It downloads the Minecraft side.
  5. Use a save after Helgen, or the recommended Alternate Start mod. The opening cart sequence can get stuck.

Allow around 3 GB of extra RAM and 1.5 GB of disk. Avoid camera takeover mods while testing. E opens Minecraft’s inventory; G activates Skyrim objects. Read the README for full controls and limitations.

Give your agent the SkyCraft setup job

Copy-paste this
Help me set up https://github.com/chasmlol/SkyCraft. Read the current README and Releases. Inspect my Skyrim edition and exact runtime, SKSE version, Address Library and mod manager. Check compatibility before installing anything. Use the normal SkyCraft release ZIP, not the PDB symbols ZIP. Back up saves and identify camera-mod conflicts. I will sign in to my own Minecraft Java account manually. Use a post-Helgen save for the first test. Ask before changing my game folders or launching the game. Report results and remaining issues.

Minecraft in GTA V: the advanced setup

The Minecraft × GTA V passthrough example is inside Universal Modder. Both games run together, with Minecraft blocks and events drawn into GTA. TNT explosions can affect GTA vehicles and NPCs.

This is source code with build instructions, not a one-click release. The documented target is GTA V Legacy on Steam, story mode, not Enhanced. Requirements include Windows with WSL, Minecraft Java 26.3 with Fabric, ScriptHookV, ReShade with add-on support, Visual Studio C++ tools and JDK 25.

Open the exact requirements and build steps. Give your agent that folder and ask it to audit your installed versions before building. Keep this setup in story mode.

Install Universal Modder in Claude Code

Universal Modder gives your agent workflows for inspecting games, building mods and testing them. Its mashup-mods skill covers crossover projects.

Run these commands inside Claude Code, one at a time:

Copy-paste this
/plugin marketplace add rehan-remade/universal-modder
/plugin install universal-modder@universal-modder

Using Codex instead

For the Codex CLI, the repository documents these terminal commands. Confirm your installed client supports them. Other clients have their own routes in the install table. A fallback is cloning the repository and opening that folder in your coding agent.

The toolkit requires Python 3.10+ and ffmpeg. A fal API key is needed for generated-asset workflows; Blender is needed for 3D-to-sprite rendering. Agent usage and generated assets may have separate costs.

Copy-paste this
codex plugin marketplace add rehan-remade/universal-modder
codex plugin add universal-modder@universal-modder

The prompt to start your own mashup

Start with one mechanic you can test. Name the exact game and version. Let the agent investigate the route before it promises a complete crossover.

Copy-paste this
Use Universal Modder to investigate a crossover mod for a PC game I own.

Host game and exact version: [GAME + VERSION]
Game install path: [PATH]
Mechanic I want to add: [ONE CONCRETE MECHANIC]
Reference game or project: [REFERENCE]

Read mod-any-game and mashup-mods. Search the knowledge base, inspect the engine and identify a supported modding route. Explain what is feasible and what is not established yet. Back up saves. Build the smallest working version first, test it in the running game and record a short demonstration. Use official dependencies and my own game files. Keep it single-player/offline, without bypassing anti-cheat, DRM or ownership checks. Ask before installing loaders into game folders or controlling my input. Give me a rollback path and label anything untested.

All seven clip sources and their download status

A clip is not automatically a released mod. These are the original demonstrations or identified reposts.

Universal Modder was used for the GTA example. The independently released MW2 mashup and SkyCraft are separate projects; not every clip came from the same toolkit.

If something does not launch

Give your coding agent the exact error and game version. Ask it to compare them with the current README and known issues. For SkyCraft, check SKSE and Address Library compatibility first. For GTA, confirm Legacy and matching ScriptHookV support. For skating, confirm the Skate 3 executable and data folder are present.

Use games you own, keep a clean save and rollback copy, and keep experimental mods away from online anti-cheat modes.

More setup help: my ChatGPT and Codex plugins, the Claude skills guide, and GitHub URL tricks.

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Frequently asked questions

The MW2 mashup and SkyCraft have public builds. Minecraft × GTA V has source and build instructions. The Portal, Mario Kart and Tarkov demos do not have a public build verified in this guide.

No. It provides skills and tools to help an agent inspect games, choose a modding route, build and test changes. Compatibility depends on the engine, version, loaders and mechanic. Start with a small testable feature.

Yes. The MW2 mashup needs your MW2 files, and skating needs files from your Xbox 360 Skate 3 copy. SkyCraft requires Skyrim and an account that owns Minecraft Java Edition. Downloads do not include those game licenses.

Yes. Universal Modder documents support for Codex and other coding agents. Use the installation method for your client. See my plugin guide for more context.

The repositories are public, but you need the required games. Coding-agent usage and asset generation can have separate costs.