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