Ossuary Achievements Here is the full list of all 26 Ossuary 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 Sacred AssemblyCollect all five treasures Membership CardsJoin all five orders Incantation of PowerLearn all five secret words PilgrimageEnter all five places of power Also TrueUncover all five great lies Indeed Do Many ThingsReach all six endings Cole SlawExpose all five cabbages Take It With YouFind all 100 obols AbecadariumComplete the Museum labyrinth Marching OrdersComplete the Order labyrinth Cup of a CarpenterUse the grail Freedom of OblivionFree all four demons Those Who Serve the CycleLearn of the headless hydra Silver-Tongued DevilUse a new sin on a new person, 555 times Not Worth GettingReceive an answer at the Narthex Appropriately ImpatientLeave the Narthex without an answer Unrepentant CynicRefuse to think what you must, five times Cruel TruthTell the District 5 rep that they are disliked five times IndecisiveSwitch parties five times Mistreatment of... Animals?Kick skull spiders 23 times Getting to Know the TroopsSpeak to, and use all sins on, all knights in formation Rotating ExhibitDonate each sin to the museum in turn Don't Riddle Me ThatGuess wrong on each of the riddler's riddles Conspiracy TheoristTell the Stockade Guard that the conspiracy is real Savory HoneysTry to touch myself with extra sins after receiving the medal Idolatry of SelfLearn all sins