Doomsday Bunker [prev. Military Bunker]

This doomsday bunker has been infiltrated by an extremist group seeking ransom, in exchange for kill codes to a nuclear bomb. The bombs ignition fuse has been planted somewhere inside this bunker and you have been sent to defuse the bomb in one hour before it detonates. If you can successfully defuse the bomb in under one hour, you are also being ordered to vacate the bunker using a different route than the one you entered. If you fail the world outside of the bunker will be destroyed and you will be trapped inside forever.