I have Thunder 2003 for PS2. Played it all weekend. The career mode is very deep. You start off with nothing. I'm running it at legend (hardest) and I'm lapped traffic every race. Very tough. Team management is key. You have to constantly be doing R & D or repairs. You have to sign your team. Again, very detailed. The handling physics seem to be better this year. The car set up feature is a little more extensive but still is nowhere as detailed Heat. All in all, the game gets a A- from me. Not to be redundant, but the career mode is great and it is going to take me a while before I get to be competitive (which is good!).