Challenger (Famicom): Collect the crown, broach? and key to save the princess. Wisp enemies hound you down without mercy but the sight of a whale or any power-up heals the body. Sneak past skeletons to enter the item caves! (Pro-tip!) Oddly addicting.
Samurai Ghost (TG-16): Take the big sprite side scroller sections from the arcade Getsu Fumaden and you have this. Less is more game design thrives here. A satisfying challenge with the awesome vibe from the original.
Shinobi (Game Gear): Pretty fun game. You recruit other Shinobis with unique ninjitsu and abilities Mega-Man style. Then the last stage is a gauntlet that tests your wits. Soundtrack by Yuzo Koshiro!
Jewel Master (Genesis) - Simple but fun arcade-ey style action sidescroller. Reminded me of Alisia Dragoon - rockin' music and crispy pixel art. A good'n.