The world of the Dead Space franchise continues to grow and expand. Beyond just the games, there are comics and a pair of animated movies that help to expand the mythology of the world that engineer Isaac Clarke finds himself trapped in. The history of the universe that Dead Space exists in is big, and it continues to grow.
In preparation for the upcoming sequel, EA and Visceral have released a trailer that explains the history that led up to Dead Space 2, including the events of the first game. If you have not played the first game, but are planning to before the release of Dead Space 2, then be warned- thar be spoilers here.
Look for Dead Space 2 on PC, PS3, and Xbox 360 on January 25.