Summary: So i like FPS but this was horrible after 9 hours it did not tell you any back story. Just all of a sudden you come home and the empress you are supposed to to protect dies IN THE BEGINNING that happened. It just lost lure there really is no lure. Its sad for video gamer's. Yes it is worth a try but i dont recommend to play if you have other games to play. This game would be the last game on my list to play ever again.
Summary: Since I have gotten this game, I can not stop playing. Although there are some minor issues involving clipping bodies, you begin to ignore it with the sheer awesomeness of this masterpiece, I recommend getting this game and playing it on the hardest difficulty for the best experience. Another issue would be that even in some of the harder difficulties the AI are pretty stupid and can't see you from 2 meters away.
Summary: If your Bored with nothing to do buy this you will have many hours of fun for 20$. No problem playing it a second time many different ways to play the missions.
Pros: Well worth the 20$ the graphics are just like half life 2 what I like about the game are the missions are a puzzle trying to figure out your missions. You get some pretty cool powers like training Rats to eat people.
Cons: The game is only 12 hours or more but still fun to play Yes it's steam but I had no problems in loading or playing.