Reign Of Fire
Cheat mode
At the main menu, press X, Y, White, Black, X, Y, X.
Level skip
At the main menu, press X, Black, Y, Black, X, White, Y.
Invincibility
At the main menu, press White, X, Y, Black, X, Y, Black.
Double damage
At the main menu, press X, Black, X, Y, X, White, X.