Opposing Force を購入する

Half-Life 1 Anthology を購入する

次に含まれています： Team Fortress Classic, Half-Life: Opposing Force, Half-Life, Half-Life: Blue Shift

Half-Life Complete を購入する

次に含まれています： 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

Valve Complete Pack を購入する

次に含まれています： 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, Left 4 Dead 2