Midtown Madness 2, a 7 year old game published by Microsoft.
Why am I writing about this one? Well, I just installed it on my machine (stumbled upon the CD), and it's a tremendous amount of fun, just like it was in 2000 (only better, my machine is stronger now of course). The graphics is a bit old, but the vast amount of space in both cities (London, and San Francisco), and the interaction with the environment (breaking down signs, lampposts, traffic lights, etc) is just as fun as it was.
And the new addition: my son loves it, and he is learning to use the joystick to crash cars around the city (he is used to crashing planes in FSX).
If anyone still has this game, I highly recommend it!