This little addictive game contains the same elements used in games like drugwars, except with a space theme.

A fantasy RPG game available for Linux, FreeBSD and BeOS. MacOS and Windows support will come soon.

Web-based, multi-player space exploration and strategy game (PHP) [OS Independent].

Developing an Open Source strategy game based on Sid Meier's Civilization II. Public project.

Danger from the deep (aka dangerdeep) is a Free / Open Source World War II german submarine simulation. [Linux / Windows] (C++)

A massive multiplayer space trading and combat game for Linux. [GPL]

2D single player space strategy, combat, and trading game. (C++) [OS Independent]

The FlightGear flight simulator project is an open-source, multi-platform, cooperative flight simulator development project. Source code for the entire project is available. (OpenGL)[OS Independent]

Clone of the classic game "Paradroid". (C, Python) [MacOS, Windows 95/98/2000, Linux]

A 2D real-time multiplayer tank battling game. (C++) [Windows 9X/2000/XP, Linux]

Developer of the open source HAWK game engine, and the OpenNL portable networking library for Windows.

Free quiz game based on the "Who Wants to Be a Millionaire" game show. Add your own questions for classroom use or for fun. [Java, OS Independent, GPL]

A collection of open source client, server, and editor to build online role playing games.

A game module for Nova Gaming System, an open source web based game with servers worldwide.

The LGDC provides concise and accurate articles about Linux gaming news, development tutorials, and reviews of the latest tools and resources.

Developing a Real-Time Strategy

Multiplayer web-based game of space exploration and economic competition.

A web magazine devoted to open source game development.

General information about opens source games, Tux Racer and C-evo games, game programming.

A portal about Open Source Gaming. Newsfeed, articles, downloads, forum, links.

phpRPG is a multiplayer fantasy role playing game driven by PHP and MySQL, with aims to develop a web-based game engine which shares common qualities between multiple user dungeons (MUDs), paper & pen RPGs and computer RPGs.

Shawn Hargreaves has several Open Source projects and interesting articles about the future of Open Source games.

Quantum Star SE is a browser based space strategy game involving Mining, Combat, Exploration, Planets and Clans played in real time. (PHP/SQL)[Platform Independent]

Right Wing Smackdown Game. The game for the whole violent leftist family. For any unix command line, including OS X.

Sekoya is a gathering of students trying to develop nice open source games. Our main project is a MMORPG running under Linux and Windows.

Open-source Tetris implementation.

Chess engine including artificial intelligence, user interface and several features.

An Open Source project in which the user takes the form of Tux (the Linux Mascot) and races downhill through alpine trails.

Provides developers with a place to upload, meet, share, exchange ideas & codes, software & games, build, improve, bug-fix, read, redistribute, and modify the source code of contributions submitted to the site. (C/C++/VC++,Delphi,Pascal,Visual Basic, Phyton, Java) [Windows,Linux]