For a franchise like Dead Space, multiplayer is the logical “next step”.
Dead Space was a beautifully realized game, a legitimately frightening over-the-shoulder shooter whose technique of punctuating long stretches of quiet with jump scares and panic inducing swarms made for a genuinely satisfying gaming experience. The lack of multiplayer, while notable, didn’t seem like an omission so much as it did a stylistic decision; the difficulty of putting a believable excuse for multiplayer in a game so focused on isolation was immediately evident. Dead Space forced us to play single-player, and many of us loved it anyway.
As such, it’s a little surprising to see multiplayer introduced in its sequel. Without really knowing much about the storyline of Dead Space 2 (given that it won’t be released until January at the earliest), all we have is the first game to go on as a basis for the multiplayer, and the inclination is to think that the focus of the game will have to significantly shift in order to accommodate a multiplayer mode. It doesn’t make sense, given the context, so the context needs to change.