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