Enable Super Dante - Beat Dante Must Die Mode to unlock Super Dante. With this, you can transform into a devil, and use magic indefinitely.

Enable The Hard Mode - Beat the game once to unlock Hard Mode.

Enable The Legendary Dark Night Mode - Beat Hard Mode to unlock Legendary Dark Night Mode.

Secret Missions - More points can be earned in secret missions:

• Mission 3 - Critical Hit Near the broken bridge, drop into the water . Point value: 200
• Mission 4 - Phantom Baby Go back into the church where you battled the Phantom. Point value: 100
• Mission 4 - Phantom Baby 2 First defeat the Phantom Baby in the secret mission before, then go to the God of Time room. Point value: 100
• Mission 4 - The Three Beasts Located inside room that is under the biplane room. Point value: 100
• Mission 5 - One-Eyed Evil Go back to the room where you first saw Beezelbub. Point value: 200
• Mission 11 - Wandering Ghost Go back into the final room of Mission 10.
• Mission 13 - Water Cell Go to the captain's skeleton in his room. Point value: 100
• Mission 15 - Treasure of the Reaper In the where room you first got the Shield Emblem, look at the skull . Point value: 200
• Mission 16 - Stairway of Tranquility First beat Griffon, then go back to the coliseum. Point value: 100
• Mission 16 - Shadow of Darkness First beat Nightmare, then return to the biplane room again. Point value: 200
• Mission 17 - Blue Gem in the Sky Cross the broken bridge using Air Raide. Point value: 200
• Mission 21 - Hidden Bangle In front of the God of Time statue, look at the wall. Point value: 200