An MMO style zombie genre would be very good. But I think SoD is only a tester for Undeadlabs. I think they will release a multiplayer expansion such as co-op if it gets approved. Any MMO's may only be made in years to come.

I really, really enjoy this game. However, its very glitchy and those bugs can often turn into game breakers that make this clearly great game a much worse experience. For instance, the 'zombie infestations' are not quite right, the game should detect any infestation activity around 500m away from home base. Instead the game detects ALL infestations and this can cause some major issues; Such as. A rapidly decreasing morale, this will affect all members of your group, causing them to go missing on several occasions and once you have safely returned them to your base they will simply go missing again, if you cannot play any of the characters nothing can get done, long story short. GAME OVER. On the bright side though, there is an update coming very soon! This Thursday to be precise. I hope you're all aware of this game breaker and that help IS on the way! Just be patient.