You are stuck in the undead, survive yourself until the government reinforcement arrives.
Commando weapons including knife, pistol, machine gun, shotgun, ak-45 and sniper rifles; each can be bought free in app along with its ammo refill. well arm yourself before facing those undead enemies because they feel no pain. Ambush and kill the enemies before they kill you. Digital radar system, which you have shows the locations and movements of enemies.
Medic-kits are also available in store. It may take a long time for them to get calm so that you can breach the gates, don’t forget to grad some apples and bottle of water.