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The SDI, also known as the SDI Defense or Strategic Missile Defense, is a building, project, and wonder in the Civilization and Call to Power games. Its name is an acronym for Strategic Defense Initiative, and it usually gives a civilization some defense against ICBMs and nuclear weapons.


Civilization II

Civilization III

Civilization IV

Civilization Revolution

Civilization Revolution 2


Civilization: Call to Power

Other games

SDI is not present in (or the article has not been created for) the following games :

Game Article
Civilization VII SDI (Civ7)
Freeciv SDI (Freeciv)
Call to Power II SDI (CTP2)
C-evo SDI (C-evo)
Sid Meier's Alpha Centauri‎ SDI (SMAC)

Not in the following games

It has been confirmed that SDI is not present in the following games :

Civilization V
Civilization VI
Civilization: Beyond Earth
Sid Meier's Colonization
Civilization IV: Colonization

Future technology (CivRev)
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