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