Steam 上的 Left 4 Dead 2

包含 22 件物品： 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, Team Fortress 2, Dota 2, The Lab