I used to have this game for the NES called Xexyz. It was this really strange game that tried to be several different genres in one, and I actually had a ton of fun with as a kid. I don't think I've ever met anybody else who has ever heard of this game, let alone played or enjoyed it. I'm not even super sure how I came to owning it in the first place; I think it was in a box of random games my aunt got from a flea market at one point, maybe.
If any of you are sitting on an NES emulator with an archive of every official ROM and haven't tried this game, it's definitely worth checking out. Weird little gem that nobody seems to know about, it seems.