Game Guides, Cheats, Codes, Hints and Walkthroughs for Hidden Invasion on Playstation 2.

Big Heads and Deformed Bodies
At the Title screen, press Left, Left, Up, Up, Right, Right, Down, Down.

Easier Game
At the title screen, press Up, Down, Down, Up, Left, Left, Up, Right, Right, Up, Up, and Up. A sound will confirm the code. The game will be a little easier.