Doomsday Missile is a unit in Final Frontier, a mod in Civilization IV: Beyond the Sword.
Strategy[]
Doomsday Missiles are similar to regular Missiles, except once reaching their target they unleash nuclear devastation upon it. The Doomsday Missile works the same way as a Tactical Nuke from the base game. It can only jump from a friendly City to City in order to nuke enemy solar systems. Obviously building these on "scarce" solar systems is a complete waste of Hammers but given the time to prepare, you can build a Starfortress to increase your influence and to produce anti-ship missiles every 15 turns. This works as a safe for Missiles, Nuclear missiles included.
Civilopedia entry[]
The so-called "Doomsday Missile" is the culmination of the Missile's development. When technologies were developed which allowed the use of Anti-Ship Missiles in space combat, it was not long before innovative nuclear versions entered into production. Containing even thicker armor, more powerful shields and the fastest rocket engines available, everything about this weapon is designed to ensure the warhead reaches its target and, once there, unleashes lethal damage. While extremely effective, the cost of the payload coupled with the systems required to ensure its proper delivery makes these weapons also extremely expensive.