Since no one has said it so far, I'll mention Cheetahmen II. That game gives Big Rigs: Over the Road Racing a run for its money:
http://www.youtube.com/watch?v=9lkQKrmqCxQ
In addition to the Cheetahmen, I also always though Heroes of the Lance was among the worst games ever. And that's one I actually played on a real NES cartridge.
End of 2008 totals: Wii 42m, 360 24m, PS3 18.5m (made Jan. 4, 2008)







