It doesn't take long for an avid-or wickedly clever-gamer to be chafed by the limitations of videogame software or hardware. But those who make the games-and those who dig deeper-know that there's much more to gaming than conquering the bad guy. Behind the alluring graphics and deceptively simple game play lurks a hidden world. How far can you go? Farther than you might imagine. Whether you want to modify your console controller to work on other consoles, create your own text adventure, or modi…