Penguin Kun War. You'll learn to talk smack to cute, fuzzy animals from that one.
Mikie. Run around your school beating up people and avoiding teachers, while Hard Days Night plays in the background.
Hunchback. Slow moving platformer, but it'll drive you crazy how they increase the hazards a little bit at a time till they kill you.
There's a game where you're in a lumberjack competition, not Midway's Timber, but something more like '88 Games or Track'n'Field with lumberjacks. It was a lot of fun, but I can't remember what it was called or find it again.
10 Yard Fight. A simplistic football game, but extremely addictive.