Get that car parked and crank those tunes.
http://www.nintendoworldreport.com/news/37068/retro-city-rampage-dx-receives-huge-update
A new update is available for Retro City Rampage: DX on the 3DS and includes a hefty amount of new fixes and features.
Here's a list of all the added goodies and changes that are stated in the announcement video from Vblank Entertainment:
Retro City Rampage: DX has been out for roughly two months, and was well received when it released on 3DS.
I remember reading that the creator of the game said that Microsoft was incredibly difficult to deal with and that the 360 version was not profitable at all.I believe he has said that the 3DS version has already been more profitable for him then the 360 version and despite its pretty limited launch in comparison and is extremely close to overtaking its lifetime sales.