The subject of this article is from previous version(s) of Mental Omega APYR, which might contradict current information and are to be taken as reference.
The Doomsday Device is an important structure in the King of the Hill mode during version 3.0. Located at the center of a battlefield, this structure is completely invulnerable, but it can be captured by a single engineer and takes 15 in-game minutes to activate. Unless captured by the opposition in this time, the Ultimate Weapon will be unleashed to destroy all units and structures on the map, ending the game in a victory for the owner. In addition, the timer will reset each time the Doomsday Device is captured.