Clear the game on HARD.
Defeat the 8 bosses without your helmet on.
Defeat 1000 enemies.
Clear the game once.
Clear the game without getting damaged.
Defeat the 8 bosses with just your default weapon.
Clear the game without dying.
Clear the game without continuing.
Clear the game without using any energy, mystery, or weapon tanks.
Clear the game in under an hour.
Defeat one of every type of enemy.
Make it to a boss room without getting damaged.