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MECHANICS · 05

Units: Ships, Vehicles & Projectiles

Non-building, non-nuclear mobile units. Ships and trains determine map 'flow', projectiles determine instant firepower.

Name	Category	Cost / Formula	HP	Damage	Build	Upgrade	Role / Notes
Transport Ship	Ships / Vehicles	Free Free (consumes initiator's troops)	—	—	—	—	Naval landing vehicle, spawned from ports or coasts. Affected by isWaterNukes / isPortsDisabled Warships prioritize attacking transport ships
Warship	Ships / Vehicles	250,000 min(1,000,000, (n+1) × 250,000), n = existing warships	1,000	250	50t	—	Naval control unit; fires Shells against enemy ships/coasts. Auto-retreats at HP ≤ 750 Since v24: prioritizes transport ships and cools down immediately on hit
Shell	Projectiles	Free Auto-generated by warships/defense posts	—	250	—	—	Solid projectile fired by warships and defense posts. Hits can be intercepted by obstacles
SAM Missile	Projectiles	Free Free, gated by SAM cooldown	—	—	—	—	Auto-launched by SAM Launchers to intercept nukes. Default speed 12 tiles/tick Intercepts only AtomBomb and HydrogenBomb; MIRV warheads immune
Trade Ship	Ships / Vehicles	Free Free, spawned probabilistically	—	—	—	—	Auto-shuttles between ports to generate gold. v24 global cap 150 ships Captured ships transfer to the captor; destroyed ships are lost
Train	Ships / Vehicles	Free Free (auto-generated by factories)	—	—	—	—	Land trade vehicle: shuttles gold between cities and factories. Speed 2 tiles/tick Vehicle spacing 2 tiles v24 experimental: available in single-player and private lobbies

TransportShip — Landing Craft

Free to spawn, but carries sender's troops—essentially moving population across water.
Vulnerable to warship interception. v24: warships hitting transports instantly cooldown, meaning one patrolling warship can massacre a fleet.
With water nukes (isWaterNukes) enabled, also vulnerable to ocean nuclear strikes.

Warship — Naval Firepower

HP 1000, Shell damage 250. One warship survives ~4-5 engagements with 750 HP safety margin.
Below 750 HP auto-retreats for repair—don't chase wounded warships, they'll return full health from port.
Price scales with count: min(1M, (n+1)×250k), approaches cap after 3 ships.

TradeShip — Economic Flow

Auto-travels between port pairs, captured ships transfer to new owner, destroyed ships disappear.
Global cap 150 (v24); more ports = shorter average ship "lifespan".
Rejecting other players' trade (manual embargo) slows your own ship spawning.

Train — v24's Gold Carrier

Auto-spawned by Factory, travels railway between city/factory stations.
Speed 2 tiles/tick, train length configurable (more cars = more potential settlement revenue).
Key: train gold revenue based on visited station owner relationship: Ally 35k / Team 25k / Self 10k.

Shell / SAMMissile — Projectiles

Shell: 250 damage, can be blocked by obstacles. Used by warships + coastal defense posts.
SAMMissile: default speed 12 tiles/tick, intercept window requires nukeReachTick − samReachTick ≥ 0—ultra-long-range ballistic nukes are harder to intercept.

✦ Unit Interactions Summary

Warship > Transport; Transport > Coastal defenders; SAM > AtomBomb/HydrogenBomb; MIRV > All SAM; Train ≥ TradeShip (at maturity).