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