Alternate title screens - Successfully complete Arcade mode to unlock a title screen featuring Giorgio and Evan.

Successfully complete the Crisis missions to unlock a title screen featuring Elizabeth Conway with a gun.

Successfully complete the Complete missions to unlock a title screen featuring Captain Rush.

Completion bonuses - Successfully complete Arcade mode under the normal difficulty setting to unlock unlimited handgun ammunition, the Crisis missions, and Freeplay mode (no continues required).

Successfully complete Arcade mode under the normal difficulty setting twice to unlock unlimited special weapon ammunition.

Crisis Zone Shield - Successfully complete the Complete missions to unlock the Crisis Zone Shield. To activate the shield, rotate the Guncon 3 controller 90 degrees in either direction. Return the Guncon 3 to an upright position to put away the shield.

More continues - Getting Game Over on Story Mode multiple times will increase the number of continues you have until you have infinite continues.

Music Player - Successfully complete the Crisis missions.

Rock Band Reload - Here's an interesting maneuver to try if you happen to own the Rock Band drum kit for your PS3. Instead of using the buttons on the gun to reload or duck, you can use the bass drum pedal from the drum kit for the same reason. This will allow you to press down on the pedal to reload or duck while using the gun simply to shoot, freeing you up considerably during gameplay.