There is quite a large number of games for GnuLinux, contrary to common belief.  In a shop for computer games in Denmark on the 20th of Marts 2004, it turned out the shop sold a game called UnrealTournament''''''2004 which apparently also worked under GnuLinux.

There are also games for GnuLinux that doesn't run on many other platforms, like Pingus and Armagetron.

Of late, there even exists a online forum on efnet IRC called #LinuxGames, which has focus on FreeAsInBeer games for GnuLinux.  The channel has a homepage 
http://linuxgames.no-ip.info/linux/

There is also a simular channel ( #GameTome ) on freenode (irc.gnu.org), they also have a homepage: http://www.happypenguin.org/

NOTE:  Chances are your distribution of GnuLinux will contain a large number of games allready.  DebianGnuLinux has a nice collection of games for instance. So, if you want, say, FrozenBubble for DebianGnuLinux you can just AptGet it. 

Examples:

   apt-get install liquidwar
   apt-get install bomberclone
   apt-get install armagetron

Games and related:

*DoomEditingUtility
*GameOfChess (UI: XBoard, engines: crafty, gnuchess, sjeng, ruffian - maybe more)
*GameOfGo:  See GoOnLinux, GnuGo
*HuntTheWumpus
*TetrisGame
*TrekGame

OpenGl Games include:
* TuxRacer
* 3d poker
* BilliardGL
* Enemy Territory
* Armagetron
* Army Ops
* MTP-Target
* Pathogen Warrior
* A lot more.

Free (as in free beer and possibly as in free speech) games libraries for GnuLinux:
*LibSdl - sound and more
*LibGdkCardImage - drawing library for card games
*LibKdeGames - library for developing games for KDE
*ClanLib - a whole game SDK
*Allegro - http://www.talula.demon.co.uk/allegro/
*Crystal Space - A 3D game engine
*''Please add more if you know any''

----
CategoryGame CategoryLinux