Trials Rising is a bike game that is going to spend a ton of time pissing people off, but will be a ton of fun. Just like its predecessor Trials Fusion. The game involves driving assorted dirt bikes across insane tracks full of jumps and obstacles to to finish line for the best time to get bronze, silver or gold medals to unlock harder and harder tracks. Occasionally you will need to get points instead, maybe see if you can fling your rider a set distance or some other challenge.
Trials Rising has added a few new features including a tandem bike multiplayer mode. Two people, one bike, each person providing 50% of the normal riding power and riding ability. This to me sounds like it will be ruining some friendships. Either way the game sounds like a blast, best wishes and may the gaming gods bring you glory.