4ian / GDevelop
🎮 Open-source, cross-platform 2D/3D/multiplayer game engine designed for everyone.
4ian / GDevelop
GameFrameX / GameFrameX
An open-source toolbox that takes a game all the way "from idea → built → live" — Unity/Godot/Cocos/Laya clients + one .NET server. | 开源游戏全流程工具箱：Unity/Godot/Cocos/Laya 客户端 + .NET 服务器，从想法到上线一站搞定。
damian-pastorini / reldens
Reldens - You can make it - Open Source MMORPG Platform
codergautam / worldguessr
Free & Open source version of Geoguessr
AnkleBreaker-Studio / unity-mcp-server
Unity MCP Server — 268 tools for AI-assisted game development. Connect Claude, Cursor, or any MCP client to Unity Editor & Unity Hub. Scene management, GameObjects, components, builds, profiling, Shader Graph, Amplify, terrain, physics, NavMesh, animation, MPPM multiplayer & more. Free & open source by AnkleBreaker Studio.
jarrodwatts / intermission
Play Doom deathmatch while Claude works. A Claude Code plugin.
luckeyfaraday / pastel-nuketown
Browser-based multiplayer FPS built with Three.js and vanilla JavaScript — pastel-styled Nuketown arena, host-authoritative WebSocket networking, AI bots, and LAN play. No downloads, no accounts, just open and play.
AllanLotta / bo1-zombies-coop
Play Black Ops 1 Zombies in the browser with up to 4 friends online. Free Chrome extension for vel.gg/bo1z: co-op multiplayer, shared lobby, controller support, Kino der Toten and all 10 maps.
vincenzo-afk / brawl-royale
Drop into a 2D battle royale arena with up to 64 players. Loot weapons, armor, and healing items across a 4096×4096 tile-based map while a deadly storm forces you into the final circle. Built for the browser with real-time multiplayer sync, authoritative server physics, and smooth client-side prediction.
BenMcLean / CloudyQuake
Multiplayer Quake, playable straight in the browser, pointed at your own dedicated server.