The Last Bunker
Kill the zombies by clicking them or let your defensive turret do the job. Collect golden brains by killing zombies and from the rescued survivors. Train survivors to become lab technicians and increase your scientific resources! Get some bonus golden brains and science resources by killing the blue creatures that occasionally appear.
Rescued survivors need to go through series of processes before they can work in the lab and start to produce science research for you. Once you have enough resources, make sure to hire managers to idly process the survivors and upgrade your bunker. Have fun!