It's only one map, but I played with 4-10 players for an hour just now (hosting on my crappy cable) and it was a lot of fun! I had only intended to check out the map and weapons since I didn't want to install gamespy arcade, but people kept joining and weren't complaining about ping
Anyhow, CS is great, RA3 is great and there are lots of other great multiplayer fps games out there. MoH is great too based on that first impression with only one map! Very solid game, and another great choice for multiplayer shooter game. I didn't even try the teamplayer yet but I didn't see any of the problems that others have been complaining about on these boards.
I am going to be buying it for the single player game though anyhow:)
Love the sounds from the allied rifle and the rocket launchers.
Way to go 2015!