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