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