The call was put out on a twitter page yesterday with no actual indication as to what it was. All that it asked was for PS3 users to send their emails so that they could into something. That something turned out to be the closed Dead Space 2 multi-player beta. EA recently revealed the new multi-player mode for the previously single-player only game. The mode seems to be something similar to Left 4 Dead. You can play as either part of the team of humans or as the Necromorphs. There are several different types of Necromorphs that you can choose from and as them your goal is to kill the humans before they achieve their goal.
Dead Space 2 is set to release early next year. On January 25th