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