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