If you decide to preorder Dead Space 2, you will get Dead Space Ignition for free. Trailer and preorder links after the break.
Dead Space Ignition is the bridge between Dead Space and Dead Space 2. So, if you want to fully understand the story of the Dead Space series, you’ll definitely need this game. It’s more of a text-based action adventure, a slightly different approach to exploring the Dead Space universe.
Dead Space Ignition will be available for PSN/XBLA. You can buy it separately for about $5, should you decide not preorder Dead Space 2.
Dead Space Ignition Trailer
Preorder Dead Space Bonus
Participating retailers that will actually offer that preorder bonus are Amazon, GameStop, and the EA Store. The PS3 version of Dead Space 2 gets another preorder bonus: Dead Space Extraction!
Dead Space Box Art: