It is the truck racing portion of NASCAR 99 pulled out and sold as a stand-alone game. It is not an expansion pack, and in no way requires a previous purchase to run. The best thing of all is that the MSRP is $19.99 US, which is an excellent price for a game like this. My recommendations go like this: if you already own NASCAR Racing 1999 Edition, don't even think about buying this - you've already got it. If you own NASCAR Racing 2 and the Grand National expansion pack (and like it), this is an excellent way to get the truck racing portion that you are missing. If you own NASCAR 2 only, then it's your call whether to buy this or just go for the whole package and buy NASCAR 99 - that way you get Win95 functionality, the expansion pack and the trucks all in one box. It features the excellent physics model of NASCAR 99, 8 tracks, and all the top drivers from the 1998 season. Maximum resolution is only 640x480. No force feedback. Very reasonably priced.