Visceral Games today announced a demo for the action horror game, Dead Space 2, will be available worldwide beginning December 21st on Xbox Live Marketplace and PlayStation Network. The demo will allow players to discover the Church of Unitology and help Isaac defeat the Necromorph outbreak in a gruesome, unforgiving battle on The Sprawl. Dead Space 2 is scheduled to ship on January 25th for the Xbox 360, PlayStation 3 and PC.