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 "Harmonized Force" ending.
Reach all endings.
Reach max level.
Reach the "Power of Vile Blood" ending.
Reach the "Chaotic Power" ending.
Reach the "Blessing of Pure Blood" ending.
Craft all potion recipes.
Collect all entries in the collection.
Collect all potion ingredients.
Craft a potion recipe for the first time
Reach the "Power of Cleasing" ending.
Finish all levels.
Defeat Corvus.
Collect all lore.
Unlock all plague weapons.
Defeat Urd.
Collect all story bits.
Finish "Hermes Fortress" level.
Defeat Varg.
Defeat Mutated Odur.
Defeat any boss without using potion.
Defeat Sound of the Abyss.
Finish "Royal Garden" level.
Defeat The Hanged Queen.
Fully upgrade a potion.
Defeat God of the Fools.
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.