Cheat mode:
Press X(2), Y(2), click Left Analog-stick(2), Right Analog-stick(2),
press L(2), R(2) at the main menu. There is no confirmation message.
Start a game then pause and enter the options screen. The "Cheats"
option will be unlocked at the options menu, with "Trooper Level",
"Enemy AI", and "Mission List" selections.
