Check out this iPad Mini case by Techdy that not only protects the Apple device (similar to an Apple Smart Cover, but when open, the device sets up similar to the Logitech Ultrathin Keyboard Cover and gives your Mini handy video game action controls..
-check out pics and the video demo of the 'Game D' below:
Constructed with an aluminum body the 'Game D' attaches on to the Mini with magnets and can be used in both landscape and portrait modes.
Game D is the project code name for a revolutionary Gaming Device specifically made for the iPad Mini. It is the most powerful yet most portable gaming device ever made. It attaches to iPad Mini magically as a gaming add-on or as a smart cover. It is designed for both portable gaming and arcade gaming. It is an open sourced gaming device. It opens up unlimited possibilities to all Gamers and Developers.
The Game D is available for reservation at this link and will set you back only $39. The Pro version is set at $59 and will include backlighting, dual analog thumbsticks and vibration feedback.