Prison Alone Achievements Here is the full list of all 10 Prison Alone 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 Andy was here!Find Andy's favorite poster! Late DeliveryEnter the security room from D-Block Cute DogFind a cell with a dog picture inside Exit DoorFinish the game, by leaving the prison Wrong DoorFinish the game, by finding the creature's nest How did this get here?Find a cell with a tennis racket inside Lucky you!Complete the puzzle in the D-Block security room on the first try I need some coffee!Leave the prison in 30 minutes or less Mailman hired!Collect all 20 letters Conspiracy theory?!Collect all 10 Documents about HYBT Pharma