Two-mission add-on for EA’s sci-fi horror shooter arrives on XBL, PSN next week for ; no announced plans for PC release.

Electronic Arts bigwigs are already talking about Dead Space 3, but the company isn’t even done with Dead Space 2 yet. The publisher today announced that March 1 will see the launch of Dead Space 2: Severed for the Xbox 360 and PlayStation 3 versions of the sci-fi shooter.

A downloadable add-on featuring characters from Dead Space: Extraction, Severed will include two stand-alone single-player chapters. The expansion will drop players into the role of Gabe Weller, a security guard on the necromorph-infested Sprawl, as he escorts Lexine Murdock to safety. Weller is equipped with an upgraded pulse rifle and security suit, both of which will come in handy when faced with the returning Twitcher, which fans may remember from the original Dead Space.

Dead Space 2: Severed will be available for .99 (560 Microsoft points). As for a PC release of the add-on, an EA representative told GameSpot that “the team is focusing on Severed for X360 and PS3.”

For more on the core game, check out GameSpot’s review of Dead Space 2.