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