Ehehe Those are the UnitedOperations.net guys. It's a half-casual half-milsim clan, they are very laidback when not on official missions, but they are one of the best and well-known clans in that title. We've teamed up with them, ShackTac, GOL and other major leagues. You can have coop sessions of around 100 players. I've been in one with 98. Yes, you read it right..full CAS, infantry etc..it's a one-of-a-kind experience in your lifetimeIt's for PC...
Rezoo do you take in that group noobs???
Edit: ARGGG Reezo got me!
There is a good deal on Steam actually, right now, but I heard it's harder to make it work with mods..and mods are the life of the ArmA serie..Looks great but for the life of me I can't find how much it costs. I found out it requires windows but I can just run it under wine (I use linux). How much did it cost you guys?