Here's a collection of links to Linux Gaming sites with brief descriptions, if you know or have any to add please send me or bwkaz a PM and let us know what was missed ;)
http://www.icculus.org/lgfaq/gamelist.php
Icculus' long list of Linux games, free/commercial
http://happypenguin.org/
The Linux Game Tome - News and reviews
www.icculus.org
Makes native ports of open sourced games
www.lokigames.com
Makes retail ports of games for Linux (out-of-business)
www.castlewolfenstein.com
Native Linux port of RtCW
www.unrealtournament.com
Native Linux port for UT and UT2003
www.idsoftware.com
(quake 3 and RTCW native ports)
www.tuxgames.com
(buy linux games here)
http://www.linuxgaminghelp.co.uk/
European site dedicated to Linux game news and downloads
http://www.icculus.org/lgfaq/gamelist.php
Long list of native Linux games with links
http://www.linuxgaming.jolt.co.uk/
http://www.linuxgames.com/
Linux gaming news site
http://www.linuxgames.com/xqf/
GameSpy like browser for online games for Linux
http://x.mame.net/
Linux port of MAME (Multiple Arcade Machine Emulator)
http://legacy.newdoom.com/
Port for Doom and Doom II with additional features
http://pingus.seul.org/
Lemmings type of game using penguins
http://games.swirve.com/
Online turn based games
http://www.transgaming.com/
Maker of WineX, a version of Wine that targets DirectX games
http://www.the-underdogs.org/
Site for abandonware/freeware games, mostly DOS (see DOSemu)
http://dosemu.org/
DOSemu and DOS emulator for Linux
http://scorch2000.com/
Java based online playable version of Scorched Earth
http://robocode.alphaworks.ibm.com/home/home.html
A Java based cross-platform AI programming battle bot game
http://robocoderepository.com/HomePage.jsp
A resource site for Robocode
http://www.linux-games.com
http://www.cosmicencounter.com
Online version of the original Cosmic Encounter board game (requires Flash)
http://sc2.sourceforge.net/
Linux/Win32 port of Star Control 2
http://server.counter-strike.net/
Resource site for Counter-Strike (Half-Life) servers
http://umodpack.sourceforge.net/
umod installer for Unreal Tournament in Linux
http://www.unrealtower.org/fom-serve/cache/80.html
Unreal Tournament 2003 cache manager
http://openut.sourceforge.net/
http://moddb.com/
Large collection of game mods for many games
http://www.linuxresource.com/Games/index.php
A pluthera of links to individual linux games
http://www.hopkinsfbi.com
great point-and-click game, lots of blood
http://www.scummvm.org
Play Monkey Island under Linux - woohoo!
http://www.introversion.co.uk/uplink/
Great 'Hacking-in-the-Future' game
http://www.scorched3d.co.uk/
3D Version of Scorched Earth
http://nwnlinux.project404.org/downloads.php
Neverwinter Nights Linux Guild
http://www.linuxquake.com/
Lots of usefull information for running Quake Quake2 and Quake3 on Linux
http://www.flightgear.org/
Open source flight simulator
http://icculus.org/news/news.php?id=1616
Download for the America's Army 1.90 Linux Port
http://www.americasarmy.com
America's Army is available for Linux and Macs also
http://www.blackbagops.com/files/howto-linux.txt
How To Setup A Linux Server With BFSMD
http://lgdc.sunsite.dk/index.html
Linux Game Development Center - News and Game Development
http://gemrb.sourceforge.net/
GenRB Project: Infinity Engine Emulator - The Infinity Engine is the Game Engine developed by BioWare Inc. used in games like Baldur's Gate, Icewind Dale, Planescape Torment.
http://tenebrae.sourceforge.net/
Tenebrae is a modification of the quake source that adds stencil shadows and per pixel lights to quake
http://icculus.org/~ravage/
Linux Game Installers by Shane Bayer
http://www.linuxgamingplanet.com/
Game news and hardware review for Linux
http://dosbox.sourceforge.net
DOSBox, a x86 emulator with DOS
http://liflg.org/
Loki Installers for Native Linux Games and Wine installs
http://priv.solsector.net/
Wing Commander Privateer Remake based off the Vegastrike engine
http://www.libsdl.org/games.php?ord...me=&perpage=all
A large collection of SDL based games
http://puzzlepirates.com
Multiplayer puzzle games with a pirate theme, Arr!