You were a prisoner who is being used as a sacrifice to lure a robot created and lost by the Galactic Federation. While you and 4 other prisoners were walking with guards behind, you entered a kind of series of certain rooms, from which smoke and a strange beeping sound. When the guards became alert, a tall and intimidating robot, about 3 meters, and yellow, came out of a hatch, and pounced on one of the guards, piercing his head, leaving you free while the robot finished off one of your companions to look at you