Terraria - Dig, Fight, Build! The very world is at your fingertips as you fight for survival, fortune, and glory.
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Minecraft - A block-building game that allows you to create and explore entire worlds from scratch.
Counter-Strike - Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation.
Roblox - Reimagining the way people come together.
Quake - Quake is a series of first-person shooter video games released by id Software.