Crysis 2 returns to Steam after last years dispute with EA, although no real reason was confirmed for the fracture between Steam and EA it has been suggested the reason was over DLC and the way it was sold.
Those who have played an EA title have more than likely seen that there is an in store facility, this allows for EA to sell DLC through the game directly to the gamers.
Crysis 2 Maximum Edition recent return to Steam is more than likely due to its lack of an in game DLC store. As the developers Crytek are only EA partners they do not require to have this feature within their game.
This news could mean that we may see the return of Dragon Age, Mass Effect and Battlefield to Steam.