Counter-Strike

Team Fortress Classic

Day of Defeat

Deathmatch Classic

Half-Life: Opposing Force

Ricochet

Half-Life

Counter-Strike: Condition Zero

Counter-Strike: Source

Day of Defeat: Source

Half-Life 2: Deathmatch

Half-Life Deathmatch: Source

Team Fortress 2

Left 4 Dead

Left 4 Dead 2

Dota 2

Alien Swarm

Counter-Strike: Global Offensive

Red Orchestra: Ostfront 41-45

Killing Floor

DEFCON

Multiwinia

Dangerous Waters

Space Empires IV Deluxe

Disciples II: Rise of the Elves

Disciples II: Gallean's Return

Iron Warriors: T - 72 Tank Command

Space Empires V

Earth 2160

Two Worlds Epic Edition

Dark Messiah of Might & Magic

Quake III Arena

Quake IV

DOOM II

QUAKE

QUAKE II

QUAKE II Mission Pack: The Reckoning

QUAKE II Mission Pack: Ground Zero

Heretic: Shadow of the Serpent Riders

The Ship: Murder Party