For those who didnt play it before it went down last time, its based on Doom with Demons and that, with similar functionality to Urban Dead, but with no turn limits!
To get off the island you've got to follow the Captain about for three buildings. Then you go to the helipad and call the helicopter. Then it gets shot down and you lose all your kit.
I'm now in Piedmont. I've found pistols, ammo, armour and radios in the police station and medikits and res syringes in the hospital.
Seems Fireteams don't work yet, and neither do shops, although you can earn cash.