It's a non linear game where basically any mission thats played on can be over 100 times as big as any MW2 map and there are numerous game MODS that can be played from CTF.C&H,AAS,CTI and all these are multiplayer game mods and the addons avaiable for it are to many to count basically you name they have a mod for it.
The multiplayer can be played with any number of player with upto 70v70 players with games ranging from 30 mins -4 hours.
Tried to play MGO earlier after mw2 all week...such a huge difference, body shots are actually worth a damn in MW2 instead of being able to pump their chest full of lead and have them still able to run off.
ive played this most of the weekend (beats all the reality tv crap) and i must say that the only thing that lets the game down is the mp, on the pc anyway. If ahyones played cod4 and/or waw then you'll understand what the problem is with iw.net servers, they are ****. Other than that its worth the