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 wonMaster KeyCongratulations! 22 April 2026 - Add a guideColosseumYou proved your worth in a battle to the death. 20 April 2026 - Add a guideFullmetal AntagonistSplash. 19 April 2026 - Add a guideBig SwordA big sword made by little guys. 19 April 2026 - Add a guideHydraAnd make it double. 12 April 2026 - Add a guideShipCrash. 12 April 2026 - Add a guideMaster NonogramYou solved all of the nonograms 11 April 2026 - Add a guideCityYou reached the city. 05 April 2026 - Add a guidePotionMakes you all dizzy. 05 April 2026 - Add a guideGhostBoo. 05 April 2026 - Add a guideMoleWhack. 05 April 2026 - Add a guideAudiophileYou found all the discs. Locked - Add a guideMineralogistYou found all of the cristals. Locked - Add a guideHealthyYou reached the maximum of HP. Locked - Add a guideYOU DIEDMany times. Locked - Add a guide