Defeat the first boss

Defeat the second boss

Defeat the third boss

Defeat the fourth boss

Defeat the fifth boss

Defeat the sixth boss

Defeat the seventh boss

Defeat the eighth boss

Defeat the final boss

Hit one enemy grenade with shuriken (only on normal or hard mode)

Complete one stage without using shuriken

Defeat the ninth boss

Complete one stage on hard mode

Finish the game on easy mode

Finish the game on normal mode

Finish the game on hard mode

Defeat two or more enemies using one grenade

Finish the Boss Rush mode

Find the secret bonus in any stage