As usual for these weekly deals it's for gold subscribers only. Here's the link if the "Goto deal" button doesn't work:
400pts - http://marketplace.xbox.com/en-GB/Product/PAC-MAN-Championship-Edition-DX/66acd000-77fe-1000-9115-d80258410a8c
Pac-Man Championship Edition has been powered up!! Three years ago, Pac-Man Championship Edition was released and took the world by storm, 27 years after the original Pac-Man's debut. Now, for the 30th anniversary of Pac-Man, this classic game has been powered-up! Everything has been upgraded! New visuals and sound! Increased number of mazes! The game you know and love has been pumped up to a whole new level!