• Include 19 titles from Valve.
  • Counter-Strike: Condition Zero
  • Day of Defeat: Source
  • Team Fortress Classic
  • Day of Defeat.
  • Deathmatch Classic
  • Half-Life: Opposing Force
  • Ricochet
  • Half-Life
  • Half-Life: Blue Shift
  • Half-Life 2
  • Counter-Strike: Source
  • Half-Life 1: Source
  • Half-Life 2: Episode One
  • Portal
  • Half-Life 2: Episode Two
  • Left 4 Dead
  • Left 4 Dead 2
  • Portal 2
  • Counter-Strike: Global Offensive