Devil May Cry Cheats

A way to get unlimited orbs is to defeat all objectives in any level,
but don't finish the level.  Save your game to your memory card
(before finishing the level), go to the option menu and reset your
game.  Then load the saved game and you will start the level over
with the orbs you collected.  Do it as many times as you like. 
The only catch is it will lower your grade once you complete the
level.

Mission 3: Fall back in the water where the skullheads were located.
Mission 3: You will start near the Judge of Death. Press X to get the secret mission.
Mission 3: After you get chased by the Phantom, at the end of the hall will be a door to the left. Enter it.
Mission 4: Return to the room with the power-up statue. You will have an encounter with the spider in the hall, just escape to the nearest door, then go back out.
Mission 4, Part 2: Go to the airplane room after the panther has been defeated, then take the elevator down.
Mission 7: Kill the enemies in the sewer hall, then go the pipe room (where the key was located).
Mission 11: Go through the door at the start of the mission.
Mission 14: Check the skeleton of the boat from the previous mission.
Mission 15: Check the skull carving underground in the previous mission.
Mission 16: Defeat the blob Boss, then go to the airplane room.
Mission 16: For a second secret mission, go to the coliseum.
Mission 17: Go through the warp zone, then cross the broken bridge without falling.
Mission 21: Check the wall on the opposite side of the power-up statue.
Game Shark Codes
Full Verison Codes
Master Code (Must Be On) EC8783C0 1446A6EC
Infinite Health Dante 1C84A688 15F6E79D1C84A68C 1456E7A5
Demo Codes
Master Code (Must Be On) EC8783C0 1446A6EC
Infinite Health 4CD98ECA 1456E4FD
Infinite Magic 4CD9925A 1456E67D
Max Red Orbs 0CFC3934 1456E7A64CFC3934 1456E404
Master All Moves 4CFC3926 145630A5
Acid Mode 4CFC2F96 1456E7A6

Beat the game in dante must die mode and unlock dant from devil may cry one with a force edge at level 5

To unlock All Star Group Photo you must get S Rank on all missions. Secret Missions:
Besides earning points by killing enemies and for time, you can earn points by completing secret missions below are all the 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