Crisis City Codes -

Extra mode:
Press Up, Down, Left, Right, X, Circle at the title screen. A new "Extra" option will appear that allows the game to be played with new enemies and alternate enemy positions.

Hidden area 6:
Select a character in versus mode. Then, highlight the random option on the area selection screen, hold L1, and press Circle.

Hidden area 7:
Select a character in versus mode. Then, highlight the random option on the area selection screen, hold L2, and press Circle.