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 "Chaotic Power" ending.
Reach all endings.
Reach the "Blessing of Pure Blood" ending.
Reach the "Harmonized Force" ending.
Reach the "Power of Cleasing" ending.
Collect all story bits.
Collect all entries in the collection.
Collect all lore.
Reach max level.
Craft all potion recipes.
Craft a potion recipe for the first time
Collect all potion ingredients.
Finish all levels.
Unlock all plague weapons.
Defeat Urd.
Defeat Mutated Odur.
Reach the "Power of Vile Blood" ending.
Defeat Corvus.
Finish "Hermes Fortress" level.
Defeat Varg.
Fully upgrade a plague weapon for the first time.
Defeat Sound of the Abyss.
Fully upgrade a potion.
Defeat God of the Fools.
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.