A new intellectual property that is 100% ripped off from all the other science fiction/horror movies and games that came before it.
The story was not the most original concept but the actual gameplay is absolutely original. The core aspect of this game is the combat. The combat system is "the game", the story is icing on the cake, but the core game is fun. You get to chop up a variety of different aliens with a bunch of different weapons while wearing a cool suit and using stasis and kinesis. Make sure you look at what the real IP of this is. It's not the dead space universe, it's the gameplay.
This game appears to be the spiritual successor of Doom in my mind. I think this is what they wanted to make in doom 3, and this is what I wanted to play. This game is a land mark in gaming in my opinion.
I loved how Tycho (penny arcade) tried to explain the big change in this as damage from shapes. You're firing vertical and horizontal lines that cut through enemies instead of just plugging them with bullets.
I can't understand how someone can look at this game and say, bah, I've done this all before. This game is so much more than that. I guess using certain weapons it could feel like the same, the pulse rifle wouldn't feel too much different, the plasma cutter is pretty close to what we've seen in the past until you turn it side ways...