As a matter of fact the game is quite alive. And it's not about mods or patches, nothing of the sort. It's all about organization of the game process. There are Russian iron front and arma2 severs that are buzzing. They have hundreds devoted players and their games are very exiting even to watch. They play regularly, mostly on weekends. The games strictly organized out of it as well as inside. You must get your registration on the server before taking part in any game. Every new game is announced in advance. There is a chain of command and you play only your slot. Every new player has the probation time up to three mouths. So, other players won't take any crazy stuff. Suffice it to say that the arma2 sever is named Serious Games. My point is that it's not right to say that the game's multiplayer is down. It's not really developer's business to lure people into multiplayer. Find friends, build the server and go ahead play.