This is a cooperative mission for up to 20 players but can be played by yourself on your own server. Food, water, first aid kits are as necessary to survive as ammo is. You will be able to carry these supplies on your character and scavenge for them in buildings, vehicles and open land. This is a survival sandbox mission that starts out dynamically different every play-through. If you dont want to just survive, but escape, you can do the optional objectives (find generator, satellite dish, satellite radio) and transmit a signal for a rescue chopper that will pick you and your friends up.
Video play-through v2.0: