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Universal Modder is an open-source toolkit by rehan-remade for AI coding agents that create offline, single-player mods for PC games. Its skills and tools identify a game's engine and existing modding route, inspect code and files, back up saves, build a working mod slice, generate art, 3D assets and audio through the fal MCP server, test the result in the running game, package it, and record findings for later agents. The repository supports Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode and other agents that read AGENTS.md, and includes the Python `um` CLI for game scanning, asset generation and processing, Windows automation, save management, video capture, publishing checks and a shared knowledge base of game-specific field notes. Its rules restrict use to games owned by the user and offline or single-player work; they prohibit online cheats, anti-cheat or DRM bypasses, and distributing game files or decompiled code. The repository is MIT licensed and requires Python 3.10+ and ffmpeg; Blender is used for 3D-to-sprite rendering.

Claude Code Game Studios is an open-source template that turns a Claude Code session into a structured game-development team. It provides 49 specialized agents across directing, design, programming, art, audio, narrative, QA, production, and release, plus 74 slash-command skills, document templates, path-scoped coding rules, and validation hooks. Agents use vertical delegation from directors to department leads and specialists, while cross-department changes are coordinated by a producer; the collaboration protocol has agents ask questions, present options, draft work, and wait for user approval rather than operating as an autopilot. The template supports Godot, Unity, and Unreal Engine workflows, with project.yaml controlling engine settings, workflow rigor, documentation, review, team size, and testing behavior. It is distributed under the MIT License and is intended to be cloned or used as a project template with Claude Code.

BRUTAL is an open-source C# framework for making games or building a separate game engine. It provides a custom interop layer for direct access to native APIs, along with low-level libraries for unmanaged memory, collections, strings, mathematics, concurrency, logging, localization, and bindings for graphics, windowing, audio, networking, physics, and other native components. BRUTAL deliberately has no editor, scene graph, renderer, or general-purpose engine architecture. Developers assemble their own stack from separate NuGet packages, such as packages for Vulkan, GLFW, Dear ImGui, FMOD, RakNet, Jolt, and Box2D; the framework uses unmanaged memory, unsafe code, and allocation-avoiding components where appropriate. The repository contains the source for its published packages. BRUTAL is developed by Ahwoo Limited and is free to use, modify, and distribute, including in commercial games, under a licence based on MIT with attribution requirements.

Rabbet is a from-scratch C++ 3D game engine with a sparse-set entity-component system, versioned entity handles, dense component pools, and a system-and-resource runtime. Its OpenGL 4.1 renderer provides a forward path with metallic-roughness PBR, a Phong fallback, lighting and shadow maps, emissive surfaces, optional image-based lighting, post-processing, CPU particles, and heightmap or noise terrain. The Forge editor provides a dockable ImGui workspace around a render-to-texture viewport, asset thumbnails, hierarchy reparenting, click-to-pick, snapping gizmos, and Play/Pause/Step/Stop controls that snapshot and restore scenes. Assets use stable UUIDs and .import sidecars; models, textures, audio, materials, shaders, prefabs, and scenes are supported, with scenes stored as readable JSON. Lua behaviors run through sol2 with live hot-reload and inspector-editable fields, while physics uses Jolt rigidbodies and audio uses miniaudio. The repository includes the engine, editor, examples, and tests, including the Orb Hunt demo game. It uses CMake 3.24 or later and a C++20 compiler, supports macOS and Linux, fetches pinned dependencies during configuration, and is licensed under Apache License 2.0.

WandEnhancer is an open-source interoperability and user-interface enhancement tool for the Wand (WeMod) desktop application. Its .NET patcher modifies files in a selected local Wand installation, while a bundled version.dll proxy changes Wand's Electron ASAR-integrity fuse byte inside the application's own process. It supports local configuration management, client-version compatibility adjustments, client-side layout and theme customization, AI features, and custom JavaScript injection into Wand's renderer. Injected scripts have DOM and Node require access, run with the Wand client's privileges, and are wrapped so thrown errors are logged rather than crashing the application. The tool includes an optional Remote Web Panel that starts a plain HTTP/WebSocket server on the local network at TCP port 3223, allowing a phone on the same LAN or VPN to control the active trainer. The panel has no pairing code, so the project warns against exposing the port to the public internet. The patching step has no updater or project telemetry, although the optional panel can use Wand's existing API/CDN paths. The project does not publish prebuilt executables; users build it on Windows with CMake, Node.js and pnpm, Visual Studio/MSBuild, and .NET Framework 4.8, or run its GitHub Actions workflow from a fork. It is licensed under Apache-2.0.