N64: Road Rash 64 (hardly anyone i know has heard of this, without a doubt some of the funniest things you'll ever do and see in a n64 game).
Jet Force Gemini - Awesome, just awesome.
Jaguar (yes, jaguar) - Dino dudes, (think of lemmings)
Alien vs predator, (one of the best FPS games i've played, yet because of such a lowly known console, so many missed out)
Xbox - Call of Cthulu: edges of darkness - best thriller game i've played, excellent story.