http://www.nintendo.com/whatsnew/detail/Mf9RJDcWmALXECxUdPB0Lf3N9Jb2VtRt

Feel the rush as your kart rockets across the ceiling! Race upside-down and along walls on anti-gravity tracks in the most action-fueled Mario Kart™ game yet! Take on racers across the globe and share videos of your greatest moments via Mario Kart TV.* Driving up a waterfall or across the ceiling can provide an intense adrenaline rush, but that’s not all anti-gravity is good for. It also provides a wild new gameplay mechanic: if you collide into other racers in zero-g, you’ll earn speed boosts worth bragging about. Luckily, you can upload and share your best moments and watch your friends’ using the all-new Mario Kart TV.* Returning features include 12-player online play*, gliders, underwater racing, motorbikes, and custom karts. You can even race as Bowser’s seven minions, the Koopalings!

• Race along walls and upside-down on twisting anti-gravity racetracks!
  
• Share highlight videos of your greatest moments with friends via the Mario Kart TV feature and Miiverse™*
  
• Race and battle with friends locally* or connect online to play with random players from around the world*
  
• Fan favorite features from past Mario Kart™ games include gliders, underwater racing, motorbikes, mid-air tricks, and more
  
• For the first time ever, play as all seven of Bowser’s minions, the Koopalings!
  
• Crisp HD graphics and fluid animation offers players the most visually stunning Mario Kart™ yet
  

*Wireless broadband Internet access required for online play. Learn more at support.nintendo.com. Additional systems and games are required for multiplayer mode. Sold separately.