Book excerpt: BradyGames' Cheat Code Overload Summer includes the following: The latest in the collection of the most sought after codes and cheats for the hottest games released for the next-gen systems. Some of the titles covered in this exhaustive pocket guide are: Grand Theft Auto: Chinatown Wars, NBA 09: The Inside, Tom Clancy's Endwar, Lost Planet: Extreme Conditions Colonies Edition, and more. Tips for activating and finding invulnerability, invisibility, unlimited ammo, debug modes and more. Plus, how to unlock characters, levels, game modes, vehicles, endings, and videos. Secret codes give gamers the edge needed to get the most out their gaming experience, as well as increase replay value. Platform: P3, P2, Xbox 360, Xbox, Wii, GC, GBA, DS, PSPGenre: Various