IMO, this is one of the best Sonic games out there. Some races you have a car, then it turns into a boat and sometimes an airplane. The grand kids (and big kids) all like racing games. This has a lot of levels to it. (World Tour) A lot of areas to unlock. A lot of characters to unlock. You collect a star for each race passed and it takes a certain number of stars to unlock new stages and characters. Different difficulty stages. Easy & medium stage place at least 3rd place. For hard stage you have to take 1st place. A star awarded for each stage. The younger grand kids like the easy and medium stages. The older ones like the challenge of the hard stage. There are lots of other stages to pass besides races. There are sprints, traffic attacks, boost challenge, etc.For the money there is a lot of play in this game. We all thought the graphics for this game was outstanding. There is the "Career", "Match Making" & "Custom Game". "World Tour", "Grand Prix", "Time Attack", & "Single Race". Lots of playing time.Xbox Live there is online multiplayer 1-10. Co-op 1-10 players. Also has voice capability.Xbox 360 players 1-4 Co-op 2-4HDTV 720P/1080i/1080p