Besides Master Of Darkness, there was one other way to get Castlevania-style action on the SMS - get Kenseiden. What with all of the different techniques available to Hayato, plus all of Japan to explore, Kenseiden was quite deep. This was also the first SMS game I ever played... ah, memories.
The Metal Gear Solid of shooters. Absolutely fantastic in every way, shape and form - and a must buy if you're a PSX owning shooter fan.
Compile's shining moment on the Genesis. MUSHA (Metallic Uniframe Super Hybrid Armor, in case you were wondering) is the best overhead shooter on the Genesis. You won't find a better one out there, no matter how hard you look.
A truly fantastic (but almost forgotten) ninja game that plays like a combination of the NES games Ninja Gaiden II: The Dark Sword Of Chaos and Demon Sword, which were both good games on their own. If you can imagine what a combination of the two would be like - and add an extremely heavy Japanese theme, you'll have Ninja Spirit.
Gunpei Yokoi's adventure classic. So much has been said about this game that I really can't think of anything else to say - except that after all these years, it still rocks.
One of the better games in Namco's fantastic Splatterhouse series. Hey - any game where you can hack up mutant skinless zombies with a chainsaw is okay in my book.
One of the best sidescrollers on the SNES, and what makes it even better is that it's based on Indiana Jones, one of my favorite film heroes ever.
One of the hardest games ever made for the SNES - hell, it's one of the hardest games ever made period. Yet something just keeps drawing me back to it - probably the fact that it completely rocks.
ThunderForce III is one of the crown jewels of the ThunderForce series, sporting effects and gameplay that were almost unheard of at the time it came out. A lot of people prefer ThunderForce IV over III, but I like III just *that* much better.
An absolutely fantastic game, which unfortunately hasn't had a decent sequel since Ninja Gaiden II: The Dark Sword Of Chaos in 1990 (Ninja Gaiden III: The Ancient Ship Of Doom was decent, but not quite up to par with the first two, sadly). I'd love to see a new one...