Motionsports Adrenaline

Exactly as it says on the tin. Play every co op and relay event which includes coin grab, speed freak and relay. This can be done with one player as all you need to fool the kinect is a chair or large lamp etc. When it comes to signing in the second player just move the chair to your left and it should recognise you as the second player. May take some trial and error but it does work. The only annoying one using this method was climbing but you should be able to figure it out. Good luck!