Here is the full list of all 38 Thymesia achievements.
Reach max level.
Unlock all achievements.
Break 1000 barrels.
Collect all lore.
Collect all entries in the collection.
Fully upgrade a plague weapon for the first time.
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.
Collect all story bits.
Unlock all plague weapons.
Defeat Urd.
Defeat Sound of the Abyss.
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.
Defeat any boss without using potion.
Finish "Sea of Trees" level.
Defeat Odur.
Dead for the first time.
Unlock a plague weapon for the first time.
Start recalling for the first time.
Empty the first health bar of Varg in the tutorial.
Finish the tutorial.
Rest at the beacon for the first time.
Reave a plague weapon for the first time.