Mario & Sonic at the London Olympic Games - E3 2011 trailer (Game)

Mario & Sonic at the London 2012 Olympic Games is a sports video game developed by Sega Japan. It will be published by Nintendo for Japan and by Sega for North America, and Europe. The game is officially licensed by the International Olympic Committee (IOC) through exclusive licensee International Sports Multimedia. It is the third installment in the Mario & Sonic series after the commercial success of its predecessors. The game will be released on the Wii and the Nintendo 3DS handheld on a date to be announced, and is an official video game of the 2012 Summer Olympic Games.
Mario & Sonic on the Wii and 3DS is a collection of numerous events based on the Olympic Games. Players can assume the role of a Nintendo or Sega character while competing against the others in these events.

text source: wikipedia.org