Movie Star Planet - Movie Star Planet is an Online Virtual World, MMO, and RPG Simulation by MovieStarPlanet.
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Second Life - Second Life is a virtual reality platform where individuals interact in a virtual world. The software was developed in 2003 by Linden Labs. More than one million people now regularly use the software.
Counter-Strike - Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation.
IMVU - IMVU is multiplayer online video game created by ‘IMVU Inc’.
Quake - Quake is a series of first-person shooter video games released by id Software.