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