- 8,723
Not to stray way off topic, but do any of these games offer an offline career mode? I've been interested in a few but don't really have the bandwidth.
pCARS might more-than-adequately cover that angle, but that's still in development.
There's always the Race Driver and GRiD games, but they're sort of semi-sims at best.
The GTR games certainly are more of your traditional sim, in that they have offline championships, but not really any "career" as such. rFactor has progression in its vanilla form, but I never bothered with it, so can't comment on it. Game Stockcar seems like a traditional sim, too, but I've not played it. iRacing cannot be raced offline at all, sadly.
EDIT: Yes, the main reason to get rFactor would be for (some of) the mods.