This game makes Halo feel insignificant!
The gameplay is suprisingly fun. The combat defines it all. You can take cover behind objects in a variety of ways. The enemies are really cool/freaky/weird. There are a variety of enemies ranging from creepy little evil monkey type things to gigantic spider like bosses. And lets not forget the weapons. A few cool weapons in GoW are the Torque Bow which is a bow and arrow that shoots exploding arrows, the Hammer of Dawn which is a sattellite weapon that shoots an extremely powerful beam of energy, and the famed Lancer Assault rifle which is a fully automatic rifle with a Chainsaw bayonett.
If you have a 360, YOU HAVE TO GET THIS GAME. THIS IS NOT AN OPTION. And if you dont have a 360, get one and this game!