Defeat the Gordon in his dragon form in the Underworld only damaging him with Dash and Jump pad attacks and without using a partner's special ability or summoning a Guardian
Defeat the Emperor in the Underworld without damaging him before all of his defense drones are destroyed and without healing from Princess Elikshil or summoning a Guardian
Open all 203 treasure chests in the game on pro difficulty without using a password. Although chests will respawn after running out of continues, they only need to be opened once. Achievement will reset if you quit to the title screen