Ahem, GTR 2 has an advance physics system, and does variable weather too. Its a blast to drive! The physics is actually better than GT4, did I mention the online component? Yea, you can race online against not just 6 people but up to 30 +, dont know the exact figures. Superb graphics too, the only better sim is rFactor, due to its modability.
$20 seems like a deal based on its MSRP of $30, and I think this time SimBin dropped starforce!
OH! I think you can use the GGC for $15!!!!!!!!! Imma pick one up today.
ANDDD theres damage too! GO BUY IT!!