Game GitHub Repositories (2026) · Open Source Tools

An open source re-implementation of RollerCoaster Tycoon 2 🎢

The automation tower defense RTS

A free cartoon browser game about how the internet really works: lay fiber and subsea cables, peer at IXPs, bill on the 95th percentile and survive backhoes, sharks and route leaks on your way to Tier 1.

♞ lichess.org: the forever free, adless and open source chess server ♞

A feature rich Android Port of Mario Kart Wii and Retro Rewind, fast and cool.

Complete Open Source and Modular solution for MMO

Space exploration, trading, and combat game.

Open-source roguelike shooter for Android. Simple controls, no ads, no tracking, no internet permission. Free forever under GPLv3.

Memory, focus & math trainer

🎮 Real-time Game Translation Tool | OCR + AI Translation | Windows Gaming | Open Source

Multiplayer client for Call of Duty: Modern Warfare 2 (2009).

Scalable open-source game backend server: multiplayer, matchmaking, leaderboards, chat, and social features for games.

A World of Tanks-style armored combat simulator built directly with Three.js and Vite: 220 vehicles, 33 destructible battlefields, and 13 modes, with plate-level armor, ballistics, modules, spotting, and physics. Play in your browser on desktop or mobile. Built end-to-end by a multi-agent Claude/Codex pipeline.

Aim-based rhythm game client, built in Godot 4

Open-source engine for Heroes of Might and Magic III

DotRecast - a C# port of Recast & Detour, Industry-standard navigation mesh toolset for .NET, Unity3D, games, servers

Driveclub PS4 PC Port

A powerful utility for Among Us designed to enrich your game experience with custom features!

An open source, turn-based strategy game with a high fantasy theme.

Open-source, single-player Travian alternative inspired by Travian T4 and Travian Kingdoms