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