The full game is wayyy better then the demo! In single player there are 63 races in which you must earn 450 lights and you can win fully upgraded cars from the boss's that you can use online once you have them unlocked (unlocked online). For multiplayer just like COD4 there are 50 ranks and 10 prestiges and every time you prestige you get a legendary car. So far the first legendary car (BMW ACS1) is nothing special and the second one which i have yet to earn (i will be sitting at 1st prestige rank 39 till i get my 360 back) is a 2011 Camaro which is just as good as one of the cars you win in single player so its nothing great either. As for the tracks there are tons of them, 30 tracks in 14 environments i believe, and each variation of each environment is much different. Also all the different mods that you can unlock are friggin sweet, although there are 2 kinda cheap ones. One lets you drop decoy power-ups that are explosive if anyone trys to pick them up and the other makes your car turn invisible while racing and you become visible when using a power-up or taking damage.
It is fun as hell and i was loving it and will miss it for the next 2 weeks.
Downloads