Superstar Racing is a massively multiplayer online racing game.Play it online for free here on vitalitygames.com. Race against thousands of other people, make friends and become a rich and famous racer.Achievements are prizes you get for accomplishing a wide variety of things. Some are racing related while others you can complete in the paddock area.You can get more boost by driving close behind another car. The faster your speed is the more boost you get.Skill is what you get when you place better than other players in a race and even more if your initial Skill is lower than their's. Likewise, if you lose to players with lower Skill, you will lose some Skill Points.