Okay,

So as I guy who did most of his gaming on a C64 during the NES heyday, I'm suddenly become more interested in NES these days. So what are some hidden gems on NES?

Not the obvious popular games like Super Mario Bros, Megaman, Contra, Castlevania, Zelda, Bionic Commando, Final Fantasy, Dragon Warrior, Mike Tyson's Punchout, Metroid, Excitebike, Dunk Hunt...etc...

And not stuff on the NES top 50 (although some of the games on the list seem to not quite be top 50 material to me)...
http://www.digitpress.com/forum/showthread.php?t=1098

What's are some great NES games people may have never played?

Thanks!
Ben