It's been hovering around the to of the UK charts since before Christmas and quite frankly it's been almost impossible to find in the shops, my ordered copy took 3 weeks to arrive and now I think we know why. SEGA's Mario & Sonic at the Olympic Games has managed to sell over 5 million copies on Wii and DS combined since launch. Just over 3 months ago for the Wii game and a lot less for the DS version.

"With adored icons and fun game play, Mario & Sonic at the Olympic Games has shot to the top of the sales charts and is clearly resonating with the growing audience of casual gamers that want an engaging and accessible gaming experience," said Simon Jeffery, President and COO, SEGA of America.

"The market for entertaining games that everyone can enjoy is growing faster than any other segment in the industry, thanks in part to the explosive popularity of Wii and Nintendo DS," continued Jeffery. "A key element of our growth strategy at SEGA is to develop and publish games that appeal to this expanding market."

And apparently Wii owners don't buy games? I think it's perhaps that they buy a particular type of game.