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