Razer had a reasonable idea when it designed the Naga Epic mouse for players of massively multiplayer online games. Games like World of Warcraft, Eve Online, and Rift tend to involve complex control schemes, so why not offer committed players a mouse...
The Razer Naga Epic wireless gaming mouse features a 12-button thumb-side keypad, a 5,600dpi laser sensor, customizable pinkie-side inserts, and LED backlighting.
Using those 12 buttons well takes some getting used to, and the mouse doesn't offer quite as much value as competing high-end gaming mice.
It's not the most elegant mouse, nor does it feel worth the $130 price, but Razer's Naga Epic and its built-in, 12-button keypad could help gamers and others gain mastery over MMOs and other applications with complicated control schemes.