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