DATABASE / UNITS

Units Database

Grouped by category with cost formulas, HP, damage, and build times. Click row anchors to share direct links.

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Cost column shows current unit price on top, cost formula below (n usually means units already built).

Build duration is in ticks. OpenFront.io runs at ~10 ticks/second.

"Upgradable" structures can be invested in to increase level, improving stats (e.g., SAM range, city troop cap).

Structures · 6

Buildable structures, some upgradable for enhanced stats.

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

Sea and land transport and combat units, including trains and trade ships.

Name	Cost / Formula	HP	Damage	Build	Upgrade	Role / Notes
Transport Ship	Free Free (consumes initiator's troops)	—	—	—	—	Naval landing vehicle, spawned from ports or coasts. Affected by isWaterNukes / isPortsDisabled Warships prioritize attacking transport ships
Warship	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
Trade Ship	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	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

Atom bombs, hydrogen bombs, MIRVs: costs and blast radii.

Name	Cost / Formula	HP	Damage	Build	Upgrade	Role / Notes
Atom Bomb	750,000 Fixed 750,000	—	—	—	—	Basic nuke: low cost, medium blast radius. Blast inner 12 / outer 30 tiles Can be intercepted by SAM
Hydrogen Bomb	5,000,000 Fixed 5,000,000	—	—	—	—	Mass-destruction nuke. Blast inner 80 / outer 100 tiles Can be intercepted by SAM
MIRV	25,000,000 25,000,000 + 15,000,000 × launches fired	—	—	—	—	Long-range multi-warhead vehicle; splits into multiple MIRV Warheads on arrival. Major v24 nerf: craters can be quickly conquered MIRV body cannot be intercepted by SAM; warheads also immune
MIRV Warhead	Free Auto-produced by MIRV	—	—	—	—	Small warhead produced when a MIRV splits. Blast inner 12 / outer 18 tiles SAM cannot intercept

Projectiles automatically fired by structures/units.

Name	Cost / Formula	HP	Damage	Build	Upgrade	Role / Notes
Shell	Free Auto-generated by warships/defense posts	—	250	—	—	Solid projectile fired by warships and defense posts. Hits can be intercepted by obstacles
SAM Missile	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