According to the press release, the demo will allow players to engage in some co-op, as they "will be thrust into deep space terror when unwilling hero – Isaac Clarke – and all-new co-op companion – Sergeant John Carver – crash land on Tau Volantis, an unforgiving ice planet teeming with Necromorphs."
No word of a PC demo yet.
Dead Space 3 is due to be released on the 5th February in North America and the 8th February in Europe for PC, Xbox 360 and PlayStation 3.