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