Gran Turismo is by far the best console arcade racing game in my eyes. absolutely loved every single one. Even their licensing races were well thought and fun. I recall not starting a single race until I had gold medal in every license class
I hope they're denying it until an official release, since I've been dreaming about GT on PC since GT2 days... NFS Porsche 2000 quenched that thirst for a while, but that's a while ago.
