The very first thing you will notice in the game is the grapics. Every little object has some kind of little detail, with overall makes everything look great.
Theres also the blood and gore, you will never get tired of revving up your chainsaw and slicing your way through the Ememy, and seeing the blood splat all over the screen.
Next is the gameplay, on this game you cant just run out like a maniac, like on halo. You need to take cover and somehow flank your enemy. Also i must add that you need to aim were the Enemy will be, due for the bullets being 2x slower than other shooting games.
The Online i think is the highlight to the whole game. even though it is hard at first, you will start getting use to how to handle and aim the weapon.
SUMMARY
This is a GREAT shooter and online is GREAT, it looks and sounds GREAT, the weapon detail is GREAT, and overall this is a GREAT game