 During their excursions, the player-controlled survivors can encounter other NPC survivors of the war, who they can choose to help with gifts of food or medicine, or rob and kill.The player can also build a radio inside their shelter, which will provide useful information such as weather warnings, updates on the city's economy and news of the ongoing war effort to help the player plan appropriate shelter upgrades and scavenging missions.The player starts off with one to four survivors whose actions the player can affect.