Zombies Ate My Neighbors? It was released for the Genesis and the SNES, and it had like 50 levels or something like that. Don't remember how good it was.
Primal Rage? It was like Mortal Kombat, but with dinosaurs. I know I spent some hours playing this one.
Maximum Carnage? The Best Spider-man game ever in my opinion.
Any others that you'd played a while back that probably didn't get fame like Sonic & Mario?