HG Controllers are selling custom modded Xbox 360 controllers that features duplicate buttons on the underside which can be pressed by the same fingers holding the controller, providing a split second advantage over your opponents who are still dawdling along to a stock Xbox 360 controller. Definitely lowers your reaction time during a tense moment, and these buttons can come in a variety of combinations which will suit different games better. Halo 3 fans can pick up its 4-Button modded controller for $89.99, while those on a tighter budget can settle for a 2-Button version at $69.99.