The Genesis/MD is probably my favorite console of all time. Took a look at a few unlicensed games, holy heck:
Earth Defense:
A vertical schmup with IK graphics, OK gameplay, decent music and five stages, but decent customizability in the options for an unlicensed game. Picked it up brand new for $6, works fine on a US model 1 Genesis, but not the model 3.
Divine Sealing:
VERY basic graphics, horrible water effects, very colorful, another vertical schmup but this one has cutscenes and a plot(all in Japanese) and... Hentai

yes this game is famous for its cutscenes. That being said, the art is pretty damn good, especially for an unlicensed game. In game graphics, like I said are very basic, but very appealing. The gameplay is decent too IMO, and it feels like a very stereotypical old school game, just with its... Interesting cutscenes lol. BTW, the soundtrack is pretty damn good!
Rock man X3:
Yes, some dudes ported Megaman X3 to the Genesis, and I can't judge it that well because the emulator I used has TONS of graphical glitches that I didn't see from researching YouTube vids that may have been using either a better emulator or the real system. The gameplay is really fun, the controls take a bit of time to get used to, but the graphics are great (taken from the SNES game), the music is arguably bad but it is Megaman music on the genesis(I think it's good), and I'd definitely say it's worth getting. It is cheap on eBay, so I may pick it up, just worried it won't play in my US system(I'm 99.9% sure unlicensed games don't have region locking, but it could be anything that could keep it from running).
Brave Battle Saga:
I'm not a fan of turn based RPGs. Turns out I'm a HUGE fan of this game. BBS is a gem of a title that deserved more exposure back in the day. I feel like if they approached a publisher, they could've gotten this off the ground because it's pretty impressive. You have a big world, a good narrative, and party members, each with their own Sprite and attacks/attributes(Tim uses swords and daggers, Cherie uses bows, Iforgothername uses a staff etc.) graphics are extremely colorful and detailed, the soundtrack is amazing, the gameplay is a more fast paced RPG(at least from what I've been exposed to in this genre) and its really fun and interesting. Plus the story ain't no slouch, despite being told in a more simple manner than your Final Fantasies or Earthbounds, but after the first boss battle, the cutscene that follows will really make you hate everyone in the first village and feel bad for our protagonist. If anyone else isn't exactly a turn based RPG fan, I highly recommend this title. You get money and XP very quickly and it's more fun than other ROGs I've played. It's like Phantasy Star 4, another one I love, because of its fast pace. Did I mention I love the artwork
