Here is the full list of all 63 ATONE: Heart of the Elder Tree achievements.
Buldr and Forsetti come to Yri's aid.
Solve the Stumped to Death puzzle.
Battle Loki.
Aid Blue Heart in her task.
Battle the Ice King.
Battle Skullhorn.
Set Eiryn on her own path.
Obtain Jörm's venom.
Return Eiryn's knife to its rightful owner.
Read 20 Story Nodes or Books.
Solve the Who Sits Where? puzzle.
Solve the Griddled puzzle.
Solve the Stumped Again puzzle.
Find the famous tiny shield
Save Forsetti from her fate.
Battle Heldi.
Solve the Water Runes puzzle.
Solve the Blockad puzzle.
Solve the How Many? puzzle.
Obtain Odin's Ring from Jörm.
Solve the Jumbled Freedom puzzle.
Solve the Spring puzzle.
Battle Old Man Wulf.
Solve the Stumped puzzle.
Battle Viktor.
Battle Jörm.
Solve the Jumbled Divide puzzle.
Find a small peice of Odin's spear
Solve the Bloodtrack Puzzle.
Solve the Grid puzzle.
Talk Sven from his Blue Vein state.
Battle Sven.
Protect the Elder Tree.
Train with Thyon.
Help Dallr tune his lute.
Fight your first Arena battle.
Sometimes sacrifice is necessary to save the world.
It's over. You can go home now.
Goodbye little friend.
This is the end.
Collect all the Magic Mead ingredients.
Drink the Magic Mead.
Obtain Mayweed from Sven.
Answer all of Vèldin's questions correctly.
Complete all of Isa's puzzles.
Solve Gulli's Puzzle.
Solve the Tracked puzzle.
Solve the grouped puzzle.
Solve The Unsolvable Puzzle.
Unlock 13 Battles.
Battle Buldr.
Battle Hati and Skol.
Battle Taangrisnir.
Battle Freya.
Carry 1250 coins.
Score 6500 points against Odin.
Score 6500 points against Dallr.
Get a 90% hit rate against Tanngrisnir in Arena.
Score more than 10,000 points on any battle.
Get a 90% hit rate on any Arena battle.
Get a 90% hit rate on at least 5 arena battles.
Get a 90% hit rate on at least 10 arena battles.
Get a 90% hit rate on at least 15 arena battles.