Upon defeating the demon and recovering Guycot's medallion, Bang attempts to rescue Professor Plum, but learns that the Doomsday Bomb is already complete. The bomb turns out to be technology from an alien race responsible for creating humanity one thousand years ago. They have grown disappointed with their creation's destructive tendencies, and intend to use the bomb to hasten what they believe is the inevitable end of the world. The only way to defuse the bomb is with the medallions, but with no instructions, Bang can only guess where each medallion is placed, and is working against a countdown timer that triggers the bomb. When Bang succeeds, the alien voices its disdain that humanity will live on and announces that the alien race intends to leave Earth to its own devices and never return. Bang responds that from now on humans will look after themselves. Bang escapes Demonhead with the Hermit to reunite with Mary and receives congratulations from his commander, who also informs that Professor Plum managed to free himself and the aliens tried to fool Bang with an impostor. The Hermit offers Bang an apprenticeship, but Bang declines to see about "making a game based on these adventures!"