Every time you get stuck on a level, can't beat a difficult boss, or run  out of ammunition, GameShark is there for you. This game-enhancing accessory  gives you access to hidden internal cheat codes that programmers put in so they  can quickly test the game. Codes include infinite health, infinite lives, all  weapons, all characters, all vehicles, and more. Manufacturers are continually  making new codes for upcoming games available, and the included PC software and  USB link cable make it easy for you to download codes directly to the GameShark.  The product comes preloaded with codes for several launch titles.