FX Fighter by Argonaut(known for Starfox and the FX chip for the SNES)
Fighting games on PC used to fucking suck. They were made by western developers that maybe didn't get how these games should work, budgets were lower, gamepad support and availability was in general spotty and even if someone had a Gravis gamepad you could bet your ass they didn't have two. This meant that these games became crummy single player experiences against AI.
I also played One Must Fall, that one wasn't 3D though.
Screamer Rally was great. Really fun arcade rally game in the style of Sega Rally(but with more tracks) that plays really well with a keyboard. Also on PC, released in 97 and developed by Milestone(italians) though I could have sworn it was a Gremlin game.
Seriously, this game still holds up, it is tiny, runs on everything(software renderer) and loads instantly so if you have a couple of minutes to waste now and then this is nice to have around.
Another racing game and this one is really great: Motorhead. Made by Dice when they were a racing game studio(remember those days?). The thing that makes this game great is the "road feel", it takes 30 seconds to understand how the car grips to the surface and when you jump a crest and see the angle of the car you already know how you need to correct it when landing. So there is no "that is bullshit" surprise understeer moments and shit like that.
Runs with dgVoodoo2, don't know how well the software renderer works these days. Also available on PS1. For a 1998 game it still looks pretty decent.
Speaking of DICE, before Rallisport Challenge they made Rally Masters and I think it is the best racing game they ever made(never played NASCAR Heat so I might be mistaken).
It is the perfect combination of SEGA Rally and Colin McRae, the "road feel" is amazing and it was very forward thinking in what it supports for a game released in 2000. Widescreen? No problem. Xbox 360 controller for analog steering and gas/break? No problem.
Those games racing aren't that obscure though, I'm sure people here have played them. So...
Fucking Big Red Racing. Holy shit this game, we played it so much.
It looks old, because it is, but not particularly strange.
It gets strange.
It's like Diddy Kong Racing or something like that, except
there's no walls to keep you on the track, the track is just a suggestion for losers that get lost easily.