Civilization · City Improvements
City Walls
Defense
Tripled defense against land attack.
What it does
Triples the defense strength of units in the city (+200%). No population is lost when the city is attacked. Prevents the Flood disaster.
Key details
- Cost
- 120
- Upkeep
- 2
- Requires
- Masonry
Where it comes from
- Unlocked by
Masonry
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.
