The Nightmare Achievements Here is the full list of all 4 The Nightmare achievements.Filter Achievement View View Image viewList view Sort by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc What are achievement flags? Click to find outApply BOOOO!BOOOO! BraveYou are brave SimitDont Look Back! The NightmareThanks For Playing