Robot

Robot is a boss. To get to him you need to blow up a bunker using a bomb. You can make him mad by messing up his room. To beat him you need to mess up his room totally, then he will repair it. While he is repairing you need to shot his back with gun found in the room. You need to do this 3 times, then he will malfunction and explode. You will gain achievement called "Malfunction" and big red button which is "some kind of activation device" required to build Spaceship Ignition System.