Here is the full list of all 14 Imp of the Sun achievements.
Finish the Main Game.
Finish Eclipse Mode.
Defeat Urqu.
Defeat Tui.
Defeat Ruku.
Defeat Llanthu.
Enjoy your collection.
Find the 9 Quipus.
Finish the game without leveling up.
Watch the hidden Quipu.
Get spat on.
Finish the game in under 3 hours.
Watch the Secret Cutscene.
Beat the game without dying.