Karateka. The gameplay is just so bloody repetitive, every single fight you do the same exact button combination and then move on which is the same. I couldn't even jump or move left or right, just forwards.
Try it yourself, the trial is available: http://marketplace.xbox.com/en-GB/Product/Karateka/66acd000-77fe-1000-9115-d8025841128c
Charging 800 MSP for an awful boring 'fighting' game like this is a complete rip-off, it should be free and even still, the ratings would probably be very low. To be honest, I wouldn't play it if it was actually free.