Devil May Cry 3: Dante's Awakening Cheats

Unlock Infinite Devil Trigger
Beat Dante must die mode to unlock the Devil Trigger. er 300, 800, 1000 or 1500. She will randomly appear in one of them when you visit the shop.

Clip Reloading
Tap [L2] after firing a slow to reload weapon (i.e., shotgun) and flick it back to fire it again. It is slightly faster than waiting for the weapon to reload.

Unlock Firearms
Shotgun - Inside the bar in mission 3. This is after unlocking the blue exit door.
Artemis - Find and use all three essences on the laser machine in mission 5.
Spiral - The outdoor area in mission 9 has a high area near a waterfall; jump to the high area for the gun.
Kalina Ann - Defeat the mission 16 boss.

The Trial Of Intelligence
In mission 5, the trial of intelligence involves a hazy and misleading clue. Take a look at the skulls above each doorway and note how many "red dots" there are. Each door will thus have one, two, three, or four red dots. Enter doors 4, 2, and 3 to claim the essence of intelligence. How this relates to the riddle printed on the trial's pedastel is a question best answered by Capcom's translation department.

Pick A Boss
In mission 18, you need to fight several bosses all over again. The different coloured lights on each "Mega Man" boss platform corresponds to:

Orange - Various demons
Light Blue - Cerberus
Gold - Gigapede
Green - Agni and Rudra
Red - Leviathan
Purple - Nevan
White - Beowulf
Blue - Geyron
Black - Doppelganger

Orb Mania
A great place for orbs is the fifth secret mission found on stage 9. Go through the level untill you get to the area where you get the spiral. Go through the passageway underneath the waterfall and up through a small tunnel directly across from where you. The secret mission is marked by a few bright glowing crystals. Once inside you must destroy every breakable object within 40 seconds. The jukebox contains 500 red orbs, although there are many other things to smash as well. Since you can repeatedly pass/fail this mission and not encounter any enemies, you can repeat this process for lots of easy orbs!

Play With A Buddy
The Doppelganger style allows a second player (using an Analog 2 controller) to join the fun be pressing START. Note the camera only follows the first player (Dante), although the Doppelganger is invincible.