I don't play video games often, I don't own a system, and I only really play Madden or NBA with friends now and again. But I used to own a Game Gear back in the day, and Shinobi was the best game for it. BUT YOU COULDN'T FUCKING SAVE YOUR GAME... AHhhhh
God I fucking love Shinobi for the PS2. That was intensely difficult at first, but every time you go back to it, you find that you're amazingly better. It took me 3 years since buying it to S rank every stage and get all of the Oboro coins - and I S ranked the Ninja VR missions the day I unlocked them. I think it was April 14th, 1:32 AM, and yes I woke everyone up on the hall when I beat that shit.
I just bought a ps2, because I wanted something cheap that I could also find a bunch of cheap games for. Holy cow, Shinobi was 3 bucks, and I did not expect it to be sooo good. It's fucking badass. I can already tell I am going to enjoy it stoned too lol.