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