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