The career option challenges you to win all the races and score thousands of freestyle points in a series of unlockable tracks. Above all this, there are dozens of achievements to discover. The beauty of the game is its learning curve. Keeping your ATV on the course will take a bit of practice and mastering all the tricks and timings will take plenty of repeat plays.
The game is quite pricey but given the quality of the graphics and the longevity of the game, it is all justified.