The Single-Eye Nightmare Achievements Here is the full list of all 8 The Single-Eye 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 Light in the DarkAcquire a source of light So we Back in the MineAcquire something to break boulders Reinventing the WheelAcquire a piece of the exit door's mechanism. Crank it OpenAcquire a key to rotating a mechanism. Keep Your Eye On ItAcquire the missing piece of the exit door. Staring ContestGet caught by the Cyclops in every encounter at least once. I See No FearDon't get caught by the Cyclops for an entire playthrough. The Last SightFinish the game.