Its predacessor was the best and fans such as me are going to find their time better than that because this one is great
To be quick and simple, this game is about a squad dealing (ok killing) terriorists and the story campaign is sort of predictacle (plot wise) but the missions are exactly like any other rescue or kill all of them missions you've seen in the original but what keeps it from being repetive is its smart AI and how they take cover, use grenades and such, and hide in spots you will probably not check but sometimes they will run to you on the face and kill you fast which means you have to be quick on your hands.
Whats always the best part of this game just like the original is its online-play. The online-play is ver addicting and with now new features like you can make your clan, online-coop, original maps are back but with opposite versions of them, and etc it would be consired the number one online game before Halo 2 came out. The maps are very good and more maps are in the Downlable content but there are some issues with the online such as the ridicilous and unfair spawn-camping and the lag/glitches which hurts the action sometimes. I will always remember my friend and I would hide in the bathroom until the match ended. Overall, the game has a good single-player but mainly you will probably skip that and go to the online-play which is great. If you don't have online, this probably is not worth a buy but to those who do have it, expect this multiiplayer to be addicting to you as it did to me.