The doctor only had aggressive Soldier Robots to contend with in the bleak wasteland, but now he's got two new kinds of robots he'll discover.

Drones roam around the desert, lost without any people to clean floors and carry cans of beer from the fridge to. They're happy to help! As soon as they see the doctor, they head straight towards that friendly face. Of course, that friendly face immediately proceeds to blast them with his trusty shotgun. :-(

Worker Bots have left the abandoned factories looking for work. They want jobs, and they see a human that might have a job for them. They're tougher than drones, though, and will try to run away when they start being fired at. You'll have to hunt them down like the monster you are as they flee in terror.