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