-Hot wheels Stunt Track Challenge; A pretty fun yet lacking racing game that my brothers and I would play the shit out of.
I remember getting that for the PC for Christmas ages ago, that was a pretty fun game!
For me I'll just make a list of the obscure stuff I've played:
Jumping Flash: Early 3D platformer, the graphics arent great (this being from 1995-ish) but the soundtracks very good.
DT Carnage: A game that I'm surprised more youtube reviewers havent played, its a PS2-era driving game that mixes a card RPG system and vehicle combat, while getting absolutely none of it right. Enjoy races where you cant see the screen for 30 seconds straight, flip over because of the terrible physics, or loose control due to a badly placed ramp. It doesnt help the games built on DT Racing which was very, VERY sterile.
Enthusia: One of the few very competent Gran Turismo knock-offs, it had good physics for the time but the weird carrer mode got in the way, rather than buying cars you'd race and you could win a random competitors car, not that it mattered as most of the unlockables are earned outside of the career mode. Still, its a good dirt cheap game, and its by Konami!
Flatout 2: This game was an absolute fluke, it was perhaps one of the best Burnout competitors with ragdoll mini-games in between races. It had a good soundtrack, fun online play, but it was a fluke. The first Flatout was okay at best, and Bugbears later games arent the best (Ridge Racer Unbounded was okay, Wreckfest is in beta still 3 years after its release). Flatout 3 was made by a different company and briefly held a score worse than Garrys Incident, according to Steam.
Project Gotham Racing 2/4: These are good mostly racing games, the fourth game has pretty good physics, a neat car selection, and its dirt cheap! What hurts it is the replay value.
Twin Sector: Germanys own Portal knock-off, I actually quit playing it due to just how easy it is to die by accident (fall damage is a thing in this!)
Robot Arena: The first game was an okay budget title, RA2 was buggy but fun, and featured very good customizing options for those into Robot Wars/Battlebots stuff. Its WAS abandonware, but it might not be with RA3 being out (which from what I know is much worse and uses Unity physics instead of Havok.)
Theres probably some others that I've forgotten