Easy Mode
At the title screen, press Up, Down, Down, Up, Left, Left, Up, Right, Right, Up, Up, Up. A sound will confirm that the cheat has been entered correctly.

Big Head Mode
At the title screen, press Left, Left, Up, Up, Right, Right, Down, Down. A sound will confirm that the cheat has been entered correctly.

Go to: Hidden Invasion Info Page | nGaming Home Page.