WRECKFEST

Cars deform rather than shatter, so a side impact leaves a wheel askew and the rest of the race is you driving around it. The career mixes lawnmower races and bus derbies with proper touring cars, and the AI is aggressive enough to make contact a tactic rather than an accident.

Twenty-five gigabytes for a game that runs beautifully on older hardware, and the best answer here to the question of what happens after the finish line — nothing, the car is destroyed, and that is the reward.