Left 4 Dead 2 求生之路2:天梯3(1,2,3,4,5,6關)(Ladder to Heaven 3)

遊戲故事發生的時間與原作幾乎相同，將呈現另外四名倖存者在殭屍橫行的四個場景中奮力求生的艱辛歷程 The game takes place at almost the same time as the original game, and will present the difficult journey of four other survivors struggling to survive in four zombie-infested scenes.