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