Fav hidden gem?: DETAILS!!

Well I haven't seen a post like this on here yet so I figured "..meh wtf I'm bored".
OK here's mine.  Most Halo junkies probably already know about this game.

It's an 8-bit Halo game (calm down!) called "Halo: Gallant Girl"...yes GIRL..name's Kelly (a female Spartan).  It's made to look like a "Sega Game Gear" game and there's a "NES" version too (titled Halo: Gallant Belle).  
  
Learn more here.  
http://www.kevinberryman.com/2bitproductions/bits/halogb.asp

Now I don't know what the Halo Junkies think about it, but I thought it was a fun (and funny) little game to play around with on my spare time.  There's two difficulties, "Normal" & "Legendary".  Normal seems way too easy, I prefer Legendary.

 
Quick layout of what's in the game: 

Pffff get a life... : P

   Life       Rifle      Shotty  Grenade  Medic

 
Hidden skulls!!

Achievement notification's a nice touch.  : )  
 
  

^_^ Funny loading screens.

So whats your favorite "hidden gem"?

What the hell is 2 bit? Are you calling it crap, or are you confusing this with something that's sub Atari or something? And I'd imagine half of my favorite games ever qualify as hidden gems.

A link would've been nice.
 
My favourite hidden gem is Little Wheel. I wrote a blog on it not too long ago.