DATABASE / STRUCTURES

Structures Database

6 structures with costs, build times, and upgrade characteristics. Most building costs scale with quantity.

✦ Cost Scaling

Cost formula min(1M, 2^n × 125k) means first 4 City/Port/Factory cost 125k → 250k → 500k → 1M, then capped.

Ports and Factories share the same counter (PortBuildableGroup), so build order affects both prices.

Name	Cost / Formula	HP	Damage	Build	Upgrade	Role / Notes
Port	125,000 min(1,000,000, 2^n × 125,000), n = existing ports/factories	—	—	50t	✓ Upgradable	Naval hub: spawn base for trade ships, transports, and warships. Higher level = better trade ship spawn rate and revenue Can be captured; ownership transfers to the new occupier
Missile Silo	1,000,000 Fixed 1,000,000	—	—	100t	✓ Upgradable	Core infrastructure for launching nuclear weapons. Upgrades reduce reload time AI nukes avoid SAM-covered targets
Defense Post	50,000 min(250,000, (n+1) × 50,000)	—	—	50t	—	Land defense tower: significantly boosts defense within 30 tiles. Defense zone mag ×5, speed ×3 Range 30 tiles
SAM Launcher	1,500,000 min(3,000,000, (n+1) × 1,500,000)	—	—	300t	✓ Upgradable	Anti-air installation intercepting atom and hydrogen bombs. Cooldown 90 ticks Range scales 70 → 150 tiles by level Cannot intercept MIRV
City	125,000 min(1,000,000, 2^n × 125,000)	—	—	20t	✓ Upgradable	Raises population cap and participates in train trade. +250,000 troop cap per level Buildable even without a port (v24) Acts as a train station
Factory	125,000 min(1,000,000, 2^n × 125,000) (shares n with Port)	—	—	20t	✓ Upgradable	Spawns trains; combines with railways and cities to form a trade network. Train spawn rate (factories+10) × 15 ticks Builds railway loops

Upgrade Tiers (4 levels)

City — Each level +250,000 troop cap; high-level cities with Factory significantly boost train revenue.
Port — Higher level = better trade ship spawn rate and cap revenue (v24 balance for 150 global cap).
SAM Launcher — Range from default 70 up to ~150 tiles, formula 150 − 480/(level+5).
Missile Silo — Upgrades reduce nuke reload time; AI avoids SAM-covered targets.
Factory — Improves train spawn rate and railway throughput.