It was a Sci fi thriller/horror game that played with hallucinations and psychic disturbances along with zombies rebuilt out of alien infected human flesh. You played as a member of a rescue team who basically only had powered tools to work with, mining lasers featuring prominently. To fit in with that, amputation was one of the main forms of killing zombies . . . head shots really weren't that useful, but if you cut the arms and legs off something, it'd be that much worse at chasing you down and impaling you on some kind of bone spike.
After Dead Space, there was the not so popular, yet critically successful Dead Space: Extraction. It's an on-rails shooter set as a prequel to Dead Space first on the Wii and now on the Playstation Network (it also comes free with the PS3 version of Dead Space 2). I played the demo of this last night and it was singularly awesome. Now all I need is the new Sony submachine gun accessory . . . that's not a joke, it looks like a sci fi version of an MP5, has a digitally attached trigger, pump action reloading and can also happily hold the Playstation Move Navigation Controller. It's coming out at the end of February to coincide with Killzone 3 and I'm pretty psyched to get one to play through Dead Space: Extraction.
This thing has a button on the bottom of the stock so you can slam it to reload your gun . . . or you can use the pump action slider underneath the barrel . . . too much fun!
After that of course, the main event will be Dead Space 2. I haven't got that yet, so I can't comment on it, but I'm certainly looking forward to it :)