The best named is "diet go go". An evil mastermind figures out that he can take over the world by giving them candy and fast food. He knows that almost nobody is sensable enough to just not overeat it. Soon almost all the world is obese. You fight back by throwing candy at enemies. That makes them fatten up so they're easy to kill. Plus you're decked out in sweet 80s workout gear.  Shit, that game was prophetic.