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