Fate A massive multiplayer space trading and combat game for Linux. [GPL] http://fate.sourceforge.net/

Hawk Software Developer of the open source HAWK game engine, and the OpenNL portable networking library for Windows. http://www.hawksoft.com/

Twilight Minds Design Group An international partnership of talented programmers, artists, developers and writers who share a common vision for the future of the computer gaming industry. http://www.twilightminds.com/

Civ II Evolution Project Developing an Open Source strategy game based on Sid Meier's Civilization II. Public project. http://c-evo.org/

Tux Racer An Open Source project in which the user takes the form of Tux (the Linux Mascot) and races downhill through alpine trails. http://tuxracer.sourceforge.net

Playing the Open Source Game Shawn Hargreaves has several Open Source projects and interesting articles about the future of Open Source games. http://www.talula.demon.co.uk

Linux Game Development Center The LGDC provides concise and accurate articles about Linux gaming news, development tutorials, and reviews of the latest tools and resources. http://lgdc.sunsite.dk/index.html

phpRPG 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. http://phprpg.org

21st Century Trader This little addictive game contains the same elements used in games like drugwars, except with a space theme. http://home.mweb.co.za/iw/iwdymond/thedomain/index.htm?

Adonthell A fantasy RPG game available for Linux, FreeBSD and BeOS. MacOS and Windows support will come soon. http://adonthell.linuxgames.com

Merchant Empires Multiplayer web-based game of space exploration and economic competition. http://www.advancedpowers.com/

Snip Open-source Tetris implementation. http://snip.sourceforge.net

K2W RPG A collection of open source client, server, and editor to build online role playing games. http://www.k2wrpg.org/

The Genius Chess engine including artificial intelligence, user interface and several features. http://thegenius.sourceforge.net

Quantum Star SE 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] http://www.quantum-star.com

Blacknova Traders Web-based, multi-player space exploration and strategy game (PHP) [OS Independent]. http://www.blacknova.net/

FreeDroid Clone of the classic game "Paradroid". (C, Python) [MacOS, Windows 95/98/2000, Linux] http://freedroid.sourceforge.net/

Final Frontier Trader 2D single player space strategy, combat, and trading game. (C++) [OS Independent] http://fftrader.sourceforge.net

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

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