Scratch

Sorry to Spam, I see you like shooters, I would like to recommend Battlefield 3

Watch this: http://www.scratch.mit.edu/ext/youtube/?v=W2vg7-n0v3M

Battlefield 3 arguments
-64 players on PC
32 players on Consoles

-Huge maps, the sizes of some countries

-Vehicles: 20 types: from, Jets, Jeeps, LAVs, Tanks, Tansport Helicopter, Attack Helicopter, Boats, Bombers, Quads

-Destructible environment, no camping, tear buildings and cover apart

-Better Engine then Mw3, (Cod has been using the same engine since 4), frostbite 2, with EXTREMELY advanced graphics, and animation imported from the EA sports Engine.

-Teamwork, squads, armor assaults, coordination, spotting, assaulting. (unlike CoD, where You try to be in the spotlight with kills and pulling off 360s.)

-maps can be lowered down to infantry only 16 player combat, small packed ghettos like CoD

The two head developers of infinity ward and many other IW members left activation for EA, (the owners of DICE, and the battlefield franchise.)

Call of Duty is the same game year after year, activation just milks it, no game should have a production time of only 2 years, battlefield 3 has been worked on for 5 years now.

Modern Warfare 3 arguments

More players, get game quickly.
Small(ish) maps, letting you get to action quickly.
Many different game modes.

Non-destructible buildings, putting a player on edge always, as they know there will be many camp spots.

Good leveling system, pretty quick leveling, with new guns and CoD points, allowing you to get a good class quickly.

It makes you want to keep playing, to get to the highest prestige, not a complex system.