Civilization · City Improvements
SDI Defense
Defense
Protects the city from nuclear missiles.
What it does
Protects the city from nuclear missile attack (each city needs its own). Roughly a 70% interception rate per incoming Nuke.
Key details
- Cost
- 200
- Upkeep
- 4
- Requires
- Superconductor
Where it comes from
- Unlocked by
Superconductor
About city improvements in Civilization
City improvements are buildings constructed with production shields, each paying gold maintenance every turn. Most affect only their own city — which is why deciding what NOT to build everywhere is the real economic skill.
Strategy — Maintenance compounds: a Temple in every city is fine, a Colosseum in every city will bankrupt an early empire. Build to need, sell what you outgrow.
