bongoprophet of all the possible games of 90's shareware week, this is the one I spent most time on. I think it still must be one of the PCs most competent fighters.
Udderdude PCs were terrible platforms for fighters in the 90s due to lack of multiple controller support and keyboards being terrible. Even the arcade ports suffered greatly.
StanleyPain I played the shit out of this when it was new. For the time it had amazing graphics and music. I beat it with every robot, every pilot, every difficulty, and knew all of the special moves inside and out. I'll be damned if I could remember any of that stuff now, but god I wore this game out. The demo makes it look like it plays slow and laggy, but that's because they're level 1 bots. Once you started buying upgrades and such, the game sped up considerably.