The Mario Kart 8 game for the Wii U console just launched around the world and Nintendo claims that the game sold more than 1.2 million total units across Japan, Europe and the Americas during its first weekend on the market. Prior to Mario Kart 8, the seven games that have launched previously in the series have combined to sell more than 100 million total units worldwide. This includes two of the best-selling video games of all time: Mario Kart Wii for Wii and Mario Kart DS for the Nintendo DS family of systems.