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