The Turbo Bundle

Pretty much really hardcore sims, like really hardcore. Fuel usage, overheating, pit stops, etc. There is no real "campaign" besides championships. GTR2 has this thing called "Driving School" which is, well, driving school. I personally really like Race 07.
Check my screenshots if you want to see what Race 07, GTR2, and GTL look like.
Those games also have TONS of mods available.

Hmm mods do interest me...but I might pass. Idk. Still really tempted in the back of my mind, probably will wait til the last hour....and wind up getting it.