Buy Opposing Force

Buy Half-Life 1 Anthology

Includes: Team Fortress Classic, Half-Life: Opposing Force, Half-Life, Half-Life: Blue Shift

Buy Half-Life Complete

Includes: Team Fortress Classic, Half-Life: Opposing Force, Half-Life, Half-Life: Blue Shift, Half-Life 2, Half-Life 2: Deathmatch, Half-Life 2: Episode One, Half-Life 2: Episode Two

Buy Valve Complete Pack

Includes: Counter-Strike, Team Fortress Classic, Day of Defeat, Deathmatch Classic, Half-Life: Opposing Force, Ricochet, Half-Life, Counter-Strike: Condition Zero, Half-Life: Blue Shift, Half-Life 2, Counter-Strike: Source, Half-Life: Source, Day of Defeat: Source, Half-Life 2: Deathmatch, Half-Life 2: Lost Coast, Half-Life Deathmatch: Source, Half-Life 2: Episode One, Portal, Half-Life 2: Episode Two, Team Fortress 2, Left 4 Dead