Tandis Achievements Full list of all 37 Tandis achievements.The base game contains 13 achievements, and there are 2 DLC packs containing 24 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 DLC Packs Group DLC packs together in list DLC Filter AllOwnedNone What are achievement flags? Click to find outApply Base Base Game (Excludes DLC) 276 13 517 (14%) TandisFinish the game. Octagon Octagon Part 1 Octagon Part 2 Octagon Part 3 Octagon Part 4 Octagon Part 5 Octagon Part 6 Octagon Part 7 Octagon Part 8 First ArcComplete First Stage. Second ArcComplete Second Stage. Third ArcComplete Third Stage. Update Decagon 333 110 11 0.0085 (62%) Decagon Decagon Part 1 Decagon Part 2 Decagon Part 3 Decagon Part 4 Decagon Part 5 Decagon Part 6 Decagon Part 7 Decagon Part 8 Decagon Part 9 Decagon Part 10 Update Flowers 469 130 13 0.0073 (43%) Dodecagon Part 1 Dodecagon Part 2 Dodecagon Part 3 Dodecagon Part 4 Dodecagon Part 5 Dodecagon Part 6 Dodecagon Part 7 Dodecagon Part 8 Dodecagon Part 9 Dodecagon Part 10 Dodecagon Part 11 Dodecagon Part 12 Dodecagon Part