- godot by godotengine, 120k stars. Multi-platform 2D and 3D game engine
- Sunshine by SunshineStream, 43k stars. Game stream host for Moonlight that you run yourself
- Claude-Code-Game-Studios by Donchitos, 39k stars. Set of 49 agents and 72 skills that organize Claude Code into a game studio
- DroidDeck by Droid-Deck, 20k stars. Launcher that gives Android phones a SteamOS-style interface for games
- pyxel by kitao, 19k stars. Retro game engine for making pixel-art games in Python
- habitica by HabitRPG, 14k stars. Habit tracker that turns tasks and goals into a role playing game
- codecombat by codecombat, 8.6k stars. Browser game that teaches players how to write code
- NX2Apple by LNPANDY, 7.0k stars. macOS app that packages your own Switch games to run on iPhone and iPad
- sbox-public by Facepunch, 6.5k stars. Source code for the s&box game engine built on Source 2 and .NET
- server-survival by pshenok, 6.5k stars. Tower defense game for learning cloud architecture and scaling
- sprite-gen by aldegad, 4.1k stars. Pipeline that generates and cleans 2D sprite sheets into runtime animation atlases
- fheroes2 by ihhub, 3.7k stars. Open source engine reimplementing Heroes of Might and Magic II
- FModel by 4sval, 3.4k stars. Explorer for Unreal Engine game archives and assets
- youre-the-os by plbrault, 2.7k stars. Game where you act as a computer's OS, managing processes, memory and I/O
- highball by gauthierpiarrette, 2.3k stars. Wine-based app for running Windows games on macOS with a compatibility list
- cultivation-world-simulator by 4thfever, 2.1k stars. Xianxia world simulator where AI agents drive characters through a living world
- kaplay by kaplayjs, 1.8k stars. JavaScript and TypeScript game library for building 2D games
- Generals-Mac-iOS-iPad by ammaarreshi, 1.7k stars. Zero Hour port for Apple devices using an open engine, without game assets
- moonshine by hgaiser, 1.3k stars. Headless game streaming server compatible with Moonlight clients
- xodus-nexus by domsvoboda, 1.3k stars. Linux launcher with an Xbox-style interface for a game client
- DLSS5-Feeder by jlrouzies-fr, 1.2k stars. Feeds synthetic DLAA inputs so DLSS 5 can run in games without DLSS
- dlss-unlocked by ShyVortex, 1.1k stars. Unlocks DLSS upscaling and frame generation on RTX GPUs in DirectX 12 games
- playden-ps5 by leolobato, 1.1k stars. Runs Steam Windows games on a jailbroken PS5
- libsm64 by libsm64, 971 stars. Mario 64 packaged as a C library for embedding in game engines
- usagi by brettchalupa, 882 stars. 2D game engine for rapid prototyping in Lua with live reload and export
- MAKO by eugeniosegala, 803 stars. Vulkan layer adding frame generation and scaling to Linux games
- PokeTokenBar by chattymin, 567 stars. macOS menu bar app that turns AI token use into a Pokémon collection game
- autorun by autorunhq, 554 stars. Homebrew app that runs Windows PC games on a Nintendo Switch
- Claude-of-Tanks by Kevin-Liu-01, 539 stars. Browser tank combat sim in Three.js with armor, ballistics and many maps
- RISCBoy by Wren6991, 513 stars. Handheld games console designed from scratch, with CPU, GPU and PCB
- psp-web-recomp by snuri00, 433 stars. Runs PSP games in the browser via static recompilation to WebAssembly
- moon by damn, 425 stars. Action RPG written in Clojure
- tinyworldformer by SheepSeb, 372 stars. Tiny Rust transformer that generates game streams for a Pico 2W board
- Heronite by RafaelGoulartB, 289 stars. Game launcher for Windows and Linux uniting Steam, Epic, GOG and emulators
- age-of-agents by agentsmill, 272 stars. Pixel-art realm that turns your Claude Code and Codex sessions into a game world
- NumPlay by Mason363, 258 stars. Games for NumWorks, TI-Nspire and Casio graphing calculators, written in C
- bo2-mac by adrbn, 245 stars. Static recompilation of Call of Duty: Black Ops II to native ARM64 macOS
- civ6-mcp by lmwilki, 241 stars. MCP server letting an LLM agent play Civilization VI turn by turn
- gta2-rtx-remix by gebdag, 224 stars. RTX Remix based renderer replacement for the original GTA2 game
- xsofy by nooga, 210 stars. Roguelike game in Clojure, still a work in progress
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