Flightgear

Flight simulator

Linux, Windows

http://www.flightgear.org/

GLHorizon

Flight simulator

Windows

http://www.web-discovery.net/

Ysflight

Flight /combat simulator

Linux, Windows

http://member.nifty.ne.jp/ysdynamics/index.html

BillardGL

Billiards game

Linux, Windows

http://www.tobias-nopper.de/BillardGL/index-en.html

Orbiter

Space flight simulator

Windows

http://www.medphys.ucl.ac.uk/~martins/orbit/orbit.html

Jose

Chess game

Linux, Windows

http://jose-chess.sourceforge.net/

Scorched 3D

ScorchedEarth based game

Linux, Windows

http://www.scorched3d.co.uk/

CannonSmash

Table tennis

Linux, Windows

http://cannonsmash.sourceforge.net/

Search and Rescue

Flight simulator

Linux, Windows

http://wolfpack.twu.net/SearchAndRescue/

Bonson

Real-time strategy game

Linux

http://boson.eu.org/

Frozen Bubble

Puzzle game

Linux, Windows

http://www.frozen-bubble.org

LBreakout2

breakout-style arcade game

Linux, windows

http://lgames.sourceforge.net/

Simutrans

Transport Simulation Game

Linux, Windows

http://www.simutrans.de/

Vega Strike

3D Space Simulator

linux, Windows

http://vegastrike.sourceforge.net

Tux Racer

Tux the Linux Penguin race

Linux, Windows

http://tuxracer.sourceforge.net/index.html

Vertigo

Flight simulator

Linux, Windows

http://www.astro.ku.dk/~norup/vertigo/

Freeciv

Multiplayer strategy game

Linux, Windows

http://www.freeciv.org/

Armagetron

A 3D tron clone

Linux, Windows

http://armagetron.sourceforge.net/

Andromeda 9

Multiplayer space-sim

Linux, Windows

http://www.andromeda9.com/

Bzflag

Multiplayer 3D tank battle game

Liux, Windows

http://bzflag.sourceforge.net/

Gltron

Tron-like games

Linux, Windows

http://www.gltron.org/

FooBillard

billard game

Linux

http://foobillard.sunsite.dk/

Celestia

Space simulation

Linux, Windows

http://ennui.shatters.net/celestia/

Glaxium

3D shoot them up

Linux, Windows

http://xhosxe.free.fr/glaxium/

Blood

Multiplayer FPS

Liunx, Windows

http://www.planetblood.com/qblood/

Gl117

Flight simulator

Linux, Windows

http://home.t-online.de/home/primetime./

Carom 3d

Online multi-user billiard game

Windows

http://www.carom3d.com/

Cube

Multiplayer and singleplayer fps

Windows

http://www.cubeengine.com/

After Burner 3D

After Burner remake

Windows

http://digilander.libero.it/brodarodasoft/

Codered

FPS

Windows

FPShttp://www.planetquake.com/cor/codered/index.html

O2Jam

Multi Player Online Music Game

Windows

http://o2jam.e-games.com.my/

GunBound

Turn based team shooting game

Windows

http://gunbound.net/

Beats of Rage

Streets of Rage Remake

Windows

http://senileteam.segaforums.com/

Survival Project

Online action network game

Windows

http://english.spgame.com/

Nuclear Nibble

A 3D version of the classic games snake, worm, nibble

Windows

http://www.nuloen.com/nn3d.html

Wandering Knights

3D RPG game

Windows

http://www.nuloen.com/nn3d.html

Notrium

Single player survival game

Windows

http://www.nuloen.com/nn3d.html

F1 Pinball

Pinball

Windows

http://www.caiman.us/scripts/fw/f144.html

MindArms

2D fighting game

Windows

http://hb8.seikyou.ne.jp/home/fjj/page30.html

NetPanzer

Online multiplayer tactical warfare game

Linux

http://netpanzer.berlios.de

Trigger

Rally car racing game

Linux, Windows

http://www.positro.net/trigger/

TORCS

TORCS is a 3D racing cars simulator

Linux, Windows

http://torcs.sourceforge.net/

XRacer

Clone of Wipeout

Linux, Windows

http://www.annexia.org/freeware/xracer/

Wulfram II

Multiplayer, action-strategy game

Linux, Windows

http://www.wulfram.com

Poker3D

Clone of Wipeout

Linux, Windows

http://www.annexia.org/freeware/xracer/

Kill or Cry

2D shooter game

Windows

http://www.wulfram.com