Master Key Achievements Here is the full list of all 15 Master Key achievements.Filter Achievement View View Image viewList view Sort by Won first then 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 AllWonNot wonYOU DIEDMany times. 22 September 2025 - Add a guideHealthyYou reached the maximum of HP. 22 September 2025 - Add a guideAudiophileYou found all the discs. 22 September 2025 - Add a guideFullmetal AntagonistSplash. 22 September 2025 - Add a guideMineralogistYou found all of the cristals. 22 September 2025 - Add a guideMaster NonogramYou solved all of the nonograms 21 September 2025 - Add a guideMaster KeyCongratulations! 20 September 2025 - Add a guideColosseumYou proved your worth in a battle to the death. 19 September 2025 - Add a guideBig SwordA big sword made by little guys. 19 September 2025 - Add a guideCityYou reached the city. 17 September 2025 - Add a guidePotionMakes you all dizzy. 16 September 2025 - Add a guideHydraAnd make it double. 16 September 2025 - Add a guideShipCrash. 16 September 2025 - Add a guideGhostBoo. 15 September 2025 - Add a guideMoleWhack. 14 September 2025 - Add a guide