Renegade Kid has been pumping out some amazing retro experiences lately, and if you've yet to bite, maybe this 3DS and Wii U sale will change your mind. Starting September 12th, you can get 30% off of Mutant Mudds(3DS), Bomb Monkey (3DS), ATV Wild Ride 3D (3DS) and Mutant Mudds Deluxe (Wii U).
I honestly consider all of them to be "must haves" outside of Wild Ride 3D -- especially for the price. Bomb Monkey even has a mode where you can turn your 3DS to the side and play multiplayer on one device, which is pretty awesome. As a side note, the sale will be running for the next two weeks, so you have plenty of time to read reviews and decide!