There was a game I played on my grandma’s TurboGrafx 16 many years ago. I cannot remember the name, and searching over the years still has me befuddled.

It was a racing game, but with an RPG element where you had to continually upgrade your car and take on local race champs. I loved it and cannot for the life of me find the damn thing.

Edit: holy shit I think I found it. Final Lap Twin