Base drones

addotional facts

 * these drones can be found on bases and deposits, they run away if the enemies are close to them.
 * they collect oil drums from the oil pumps they collect metal from the metal factory.
 * you can adjust on settings "Play base drone movement sounds" which you can activate or deactivate.
 * drones collect scrap metals from the rusty vehicles around your base.
 * can may be collect thoriums on thorium deposits.