Sonic 4 Episode II is spinning it’s way towards us as you read this. One of the most prominent features you will encounter in this new venture is Collaborative Gameplay between Sonic and Tails. Sonic can cooperate with his mate Tails anywhere in the game, flaunting three combo moves to slaughter past some of the more cumbersome challenges.
The first of these is the Copter Combo (which does indeed date back to Sonic 3 and Sonic & Knuckles) allowing you to control Tails as a helicopter, hoisting Sonic up, up and away to platforms unreachable on one’s lonesome.

Not only can Tails take to the air but he can also dive underwater with the Submarine Combo. This is a real game changer given Sonic hasn’t passed his 10 metre swimming badge yet. Tails makes reaching those ever needed air bubbles a lot less of a rush job.
The final Combo has been touted the Rolling Combo where the pair join forces to create a single ball, rolling at even faster break-neck speeds and letting you take all of your angst out on not only Sonic’s enemies, but also the environments (have they taken a leaf out of Battlefield’s book here).

So who do we control then? Well, the single player adventure allows you to control Sonic and only control Tails when you feel the need for a bit of Combo Move action. When playing the two-player mode (both online and local) then each character shall be controlled be a different player, working together as a team.
The devs have said that we can expect some more collaborative game play features but that they were still trade secret for the moment.
Obviously, this is 2012 we are talking about so expect a stunning new graphics and physics engine making the game look so much better, whilst keeping the oldskool Mega Drive feel.
Sonic 4 Episode II will be arriving on the Playstation Network on May 15.
It has also been announced for the Xbox Live Arcade (May 16)
And is expected to be released for IOS and PC also in May, together with a June/July release for Android and Windows smartphones.