[quote=@CirusArvennicus]
There [i]are[/i] some computer games with local coop, but you gotta know where to look. Legend of Dungeon is a good one.

And sonic is not a computer game. Maybe some of the educational sonic games? (I had those, too.)
[/quote]

No. I had a sonic game for the computer. I remember clearly. Had a box(jewel case) and everything. It was the Sonic & Knuckles one.

And you basically had the arrow keys, and the space bar as your controls