Christmas Massacre Achievements Here is the full list of all 11 Christmas Massacre achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.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 Creepo ClownYou found the clown costume. Big BabyYou found the baby costume. Coal MinerYou found the miner costume. Impalement ArtistCleared a level with just the throwing knives. PyromaniacCleared a level with just the flamethrower. GottemKilled all the school children. Slightly DerangedCleared all levels with B rank or better. Total PsychopathCleared all levels with A rank or better. New GodCleared all levels with S rank. Tape MasterUnlocked all the achievements. Feature LengthCompleted the game.