Here is the full list of all 38 Thymesia achievements.
Empty the first health bar of Varg in the tutorial.
Unlock all achievements.
Break 1000 barrels.
Reach the "Power of Cleasing" ending.
Reach all endings.
Reach the "Harmonized Force" ending.
Reach max level.
Reach the "Blessing of Pure Blood" ending.
Reach the "Power of Vile Blood" ending.
Reach the "Chaotic Power" ending.
Finish all levels.
Defeat Corvus.
Collect all lore.
Collect all entries in the collection.
Collect all story bits.
Unlock all plague weapons.
Defeat Mutated Odur.
Craft all potion recipes.
Collect all potion ingredients.
Defeat Urd.
Finish "Hermes Fortress" level.
Defeat Varg.
Defeat Sound of the Abyss.
Fully upgrade a plague weapon for the first time.
Fully upgrade a potion.
Defeat God of the Fools.
Craft a potion recipe for the first time
Finish "Royal Garden" level.
Defeat any boss without using potion.
Defeat The Hanged Queen.
Finish "Sea of Trees" level.
Defeat Odur.
Dead for the first time.
Unlock a plague weapon for the first time.
Start recalling for the first time.
Finish the tutorial.
Rest at the beacon for the first time.
Reave a plague weapon for the first time.