Octahedron Achievements Full list of all 19 Octahedron achievements worth 1,000 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox One.Filter Achievement View View Image viewList view Sort by TrueAchievement desc TrueAchievement asc Achievement name desc Achievement name asc GamerScore desc GamerScore asc TA Ratio desc TA Ratio asc Gamers desc Gamers asc Xbox.com order Date won desc Date won asc Flag Filter All None 19 Offline Mode 19 Single Player 7 Main Storyline 1 Difficulty Specific 5 Collectable 1 Multiple Playthroughs Required Link flagsOR joinAND join Achievements without these flags What are achievement flags? Click to find outApply TRAVELOGUEBegin your journey TETRAGOULBeat World 1 HEXAPAQBeat World 2 OCTALOPBeat World 3 DODECASBeat World 4 ICOSANBeat World 5 HOMEFinish the game TETRAHEDRONCollect all tetrahedrons EQUILIBRIUMGet all optional upgrades 100%Get all 100% Medals DEUSGet all Deus Medals PAR ANY%Get all Par Any% Medals PAR 100%Get all Par 100% Medals SYMMETRYBeat 5-T and collect all of its tetrahedrons 1 guideMINIMALISTBeat 3-1, destroy no light bulbs or enemies, collect nothing FLOORMASTER 1Beat X2-2 while touching the ground just once FLOORMASTER 2Beat X4-1 while touching the ground just once BASICBeat X4-4 using only the basic platform ROGUE TRAVELLERBeat World 1 in Rogue Extra mode 1 guide