Second costumes, more weapons:
Beat the game and save. Now reload the saved game. Press Select at the Character screen and pick "Arms" for more outfits and weapons.

GameShark Codes

Infinite Health		8011ade000fa

AP Ammo			800981a803e7

HP Ammo			800981aa03e7

Thanks to Revolution readers Jeremiah Aguilar and Joshua Daniel Ignacio!