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