Thats a tough one...spent a ton of time with the various WWF titles from the Playstation era on. Beat Snatcher on segaCD at least a half dozen times. Chrono Trigger and Zelda: Link to the Past also got a lot of time. Can't remember what I played most in my younger days. I know Donkey Kong got a ton of play on my Coleco, Super Mario on my NES. Oh, and my Mom and I used to play tons of Bubble Bobble. Those are probably the top ones.