Dead Space 3

For the third installment in the Dead Space series, Visceral decided to shake things up a bit. Various changes here and there, but the biggest new thing is the co-op. Because that is what people wanted into their previously single-player horror game series, I guess. To play with someone else and make the experience not spooky at all...

Dead Space 2

I saw someone describing Dead Space 2 as Dead Space 1.5 because it does not add enough to be a whole new game in their opinion. Which might be true. The story takes place in a different location and moves the arcing plot forward but the mechanics and how the game generally works are the same indeed (if more polished).

Dead Space

I think I watched a full playthrough of Dead Space by Jesse Cox a year or two ago, and thus I was quite familiar with the game before playing it. I had definitely forgotten a whole lot of it, or maybe I only watched parts of the playthrough. Still, it may have made the game less scary and surprising.