Here is the full list of all 44 8Doors: Arum's Afterlife Adventure achievements.
Obtain all Reaper Perks
Obtain all Perks
All regions 100% complete.
Kingdom of Yama 100% complete
Guided all Fugitive Souls
Land of Abundance 100% complete
Interacted with all Dawn Tombstones
Stone Mountain 100% complete
Barren Grounds 100% complete
Obtain all Flowers of Life
Frozen Plateau 100% complete
Underground Waterway 100% complete
Crimson Mines 100% complete
Obtain all Pathfinder Perks
Misty Forest 100% complete
Obtain all Messenger Perks
Clear the game without dying.
Clear the game without learning any other Perk except Duoxini
Complete Normal Mode in 3 hours