Most likely the best EA Sports NASCAR game.
There's a number of unlockables, and you just cant buy them like the other EA Games, but you unlock them doing challanges, and races.
The Career mode is alot of fun. You manage your sponsers, sponser packages, your pit crew, builders, building your cars, and updating them. It takes sometime to get your car to win the championchip, but once you got your car good, it can take off at most tracks.
Thunder license gets you to learn the tracks, instructed by some drivers to tell you how to get around the track, and Richard Petty discribes it, and the history of it.
Thunder Challange takes you back to some races were you repeat the history, or remake them.
(If you can find this game, I say buy it, it was pretty good for a EA Sports game.)