I'm compiling a list of popular, impressive, awesome and/or community-driven game and game-related GitHub repositories for a pet project of mine.

I'm looking for everything an anything. Old school text adventures, educational games, 8-bit platform games, browser-based games, indie games, GameJam projects, add-ons/maps/hacks/plugins for commercial games, etc. I'm especially interested in repositories that have strong community involvement and awesome READMEs :-)

If you'd like to help please send me a link to the repository, or fork this repo and submit a pull request. Thank you!

• Command & Conquer - clone of the popular RTS
• Digger - HTML5 version of a Boulderdash game
• Emberwind - HTML5 port of the indie platform game Emberwind
• Lichess - High performance chess game built with PHP 5.3 and Symfony2
• Orbium - a modern version of the 90's game Log!cal
• Survivor - a playable HTML + CSS + JavaScript remake of a space-based "shoot-'em-up" arcade game for Atari / Commodore 64 from 1982, including a level editor and design tool.

• Dominion - a C# implementation of Dominion, a board/card game
• Gish - open Source version of the award-winning physics platformer
• Gorillas - An iPhone (or iPod touch) port of the popular old QBasic game

• Aquaria - a breath-taking underwater fantasy game. Winner of the Grand Prize at the 2007 Independent Games Festival
• Doom 3 - pew pew pew.
• ID Software - includes Doom, Quake, Wolfenstein and more!

• EntityJS - an HTML5 javascript game engine utlizing the entity-component design.
• Flixel - an open source game-making library written entirely in ActionScript 3
• GenesisEngine - GenesisEngine allows you to create and explore procedurally-generated planetary systems, from ground level all the way out into space. Experiments with procedurally-generated worlds, XNA, and design patterns
• Spring - an Open Source Real Time Strategy game engine
• Leaderboard - Leaderboards backed by Redis (in Ruby)
• Python Leaderboard - Leaderboards backed by Redis (in Python)
• PHP Leaderboard - Leaderboards backed by Redis (in PHP)
• Java Leaderboard - Leaderboards backed by Redis (in Java)
• Scala Leaderboard - Leaderboards backed by Redis (in Scala)
• Halo::Reach::API - Ruby gem for interacting with the Halo:Reach API
• tassadar - A Starcraft 2 replay parser written in pure Ruby

• World of Warcraft Addons - too many to list!
• World of Warcraft API Docs - the public documentation for the RESTful web service provided as part of the World of Warcraft community site.