Monster Madness: Grave Danger PlayStation 3 Cheats

Cheat mode
Enter the "Extras" and press R2 to display the cheat entry screen.

Alternate costumes
Complete the indicated Challenge mini-games with a "C" or better rank to unlock the corresponding alternate costume in the "Extras" menu.
1. Andy's costume "Astronaut": Beat Hill Defense
2. Andy's costume "Samurai": Beat Dodgeball
3. Andy's costume "Surfer Dude": Beat Jack Attack
4. Carrie's costume "Construction Worker": Beat Construction Destruction
5. Zack's costume "Secret Service": Beat Slice N' Dice
6. Zack's costume "The One": Beat Home Run Derby