I had three favourite games on my Mega Drive when I was young to play with my brother: Sonic 2 Sonic 3 (& Knuclles - but lets count it as one game as they were plugged in permanently together) and World of Illusion World of Illusion - Starring Mickey Mouse and Donald Duck The connecting fabric of all 3? Free roaming co-operative platforming gameplay. Full adventures where you could hand the second controller over and play alongside each other. No split screen, fully immersive, collaborative fun. One of the things I hated about the Mario and DKC games on the SNES consoles at other friends houses was the games 'had' 2 player modes, but really it was just take turns and switch whenever you finish a level or die. Thats not multiplayer - you could get the same effect by handing each other the controllers. The gameplay in the above 3 games was a revelation to me and my brother and any friends we brought round as Sonic was one of the few franchises we could play 'with' a friend that wasn't a shooter or a beat em up. I'm trying to work out if Sonic 2 really was one of the first game series to really do this? By this I don't mean multiplayer gaming - but to take the single player experience and offer an equivalent mode where you play alongside each other throughout. Gunstar Heroes was 1993, Kirby Super Star 1993, Metal Slug 1996 - those are all the notable examples I can think of. PSA - I don't know why but for some reason it feels as though Streets of Rage and Golden Axe don't count by my definition although I am aware of them - as they were all about the arcade feel. Beat em ups feel a natural fit for multiplayer modes, as essentially it is controlled movement through rooms each player taking down the enemies to proceed. In my head that feels different to the free roaming nature of the above 3 games in a way I can't quite codify. As this forum has some of the most noted experts can any of you point out any earlier examples I'm not aware of? Was Tails introduction really that innovative at the time or not a big deal in 1992?