Wait for the main menu to appear, then press up on your remote to reveal a hidden 'Code of the Fraternity' option. This will present you with a screen where you have to enter a secret binary code. We don't know what the code is at present, but as this is a pre-release title it's possible that the code will be included with the disc.
Select the 'Extras' option, then keep pressing the down key on your remote until you reach the last of the extras on the second page. Finally, press down once more to reveal a hidden symbol. Press enter on your remote to view a code to unlock super weapons in Wanted: The Game.
Go to the U-Control menu option and keep pressing up on your remote to reveal another hidden symbol. Press enter to view a code to unlock invulnerability in Wanted: The Game.
All easter eggs were generously submitted by SirDonk