Probably was known to everybody already, but now ARMA2 is free.
It is, as for ARMA, the lite version, with no MOD support and low res texture, but whole compatibility with MP.
"It takes forever +/- 2 weeks for the A-10 to get anywhere significant..."
"Ha! If it gets him on the deck its a start!"
"What people like and what critics praise are rarely the same thing. 'Critic' is just another one of those unnecessary, overpaid, parasitic jobs that the human race has churned out so that clever slackers won't have to actually get a real job and possibly soil their hands."