There will be 3 different groups during the Night.
Zombies, Bandits and a Colony of Survivors (with specific missions).
Of course getting supplies is a major part of this. But don't forget the Bandits always want what you have. And the Zombies always want any surviving humans.
The Bandits only job is to Survive and TAKE EVERYTHING. The Colony's job is to Survive and Achieve the missions to improve their future. And possibly save the world.
Of course the Zombie's only job is to destroy and consume any life form. There are crawlers, walkers and fast movers. Take them out with one shot to the chest. Don't waste Ammo and don't pick a fight with a Zombie. There are usually many more where they come from. Just focus on Stealth and achieving the mission(s)!!! Strategy will help you here. Otherwise you will be infected and turned into a zombie
With all that said there will be a possible antidote in case there is time after being infected. Of course if you are over ran with zombies there won't be any helping you. So Don't Pick A Fight with a Zombie!!!
There will be limited ammo. So make the shots count. And with bandits you really don't want to waste ammo. There will be ammo to be found inside. But you and your team must look for it.
It will be a race to see who gets to the ammo, medicine and supplies first.
There will be breaks in the action to hydrate and cool off. Plus we have some small changes to the cqb during that time to make it a lot more interesting.