Aliens Vs. Predator.
I loved the whole concept and how it would work.....but the Multiplayer turned from greatness into:
It turned into Predators win when they get the Disk weapon. Also, Aliens can go fuck themselves and Marines are hardly given a chance. The worst part was that the Aliens were the most fun to play as in my opinion.
Executions, while cool, either took too long or had this awkward moment where you'd end up with a whole train of people instakilling each other.
I liked playing as the Alien because I wanted to scout out an enemy, destroy the lights and pick them off like a real Alien would have. Instead....I could to it maybe once, but then a predator beats me in a melee fight.
There was this REALLY cool moment in the campaign though, towards the end where you fight Aliens as they come down this bridge. The music is just right, the weapons laid out are right, the amount of Aliens is cool, even that fast moment where you have to turn on the turret if you want so much as a chance.