OpenFront Gold Costs

Use this page as a price sheet. For when a purchase is correct, open buildings, nukes, and the building tier list. Keys that place these objects are on hotkeys. This sheet sits under the Tools Hub.

Gold in OpenFront funds structures and late units. Passive income scales with workers and tiles; conquest, donations, and trade add lumps. The numbers below are the live public-game steps. Infinite-gold private lobbies are not ranked here.

Structure costs

Structure	Cost steps	Cap	Notes
City	125k, 250k, 500k, 1M	1M	Own counter. +250k troop cap per level.
Port	125k, 250k, 500k, 1M	1M	Shares n with Factory.
Factory	125k, 250k, 500k, 1M	1M	Shares n with Port. Not a paying train stop.
Defense Post	50k, 100k, 150k, 200k, 250k	250k	30 tiles. No stack. Destroyed on capture.
Missile Silo	1M each	1M	No free warhead.
SAM Launcher	1.5M, then 3M	3M	~30s first build. Intercepts Atom, Hydro, v33 MIRV warheads.

City, Port, and Factory use min(1M, 2^n × 125k). The trap is the PortBuildableGroup: n counts existing Ports plus Factories. Examples:

• First building in the pair (Port or Factory): 125,000.
• Second in the pair, other type: 250,000, not another 125k.
• Third: 500,000. Fourth and later: 1,000,000.

City ignores that pair. A coastal Port does not raise your next City price.

Defense Posts use min(250k, (count+1) × 50k). The first 50k post is the efficient one. A fifth post at 250k on a tile you will lose is wasted because capture destroys the post instead of transferring it.

Unit and nuke costs

Item	Cost	Cap / scaling
Warship	250k, 500k, then up to 1M	250k × (count+1), cap 1M
Atom Bomb	750k	Flat
Hydrogen Bomb	5M	Flat
MIRV	25M + 15M × n	n = MIRVs already fired in the match

Warships need a Port in that body of water. v33 adds veterancy if they survive. They are not a substitute for the City you skipped to afford the second boat.

First-Atom 1.75M plan

The smallest nuclear package from zero dedicated gold:

1. Missile Silo — 1,000,000
2. Atom Bomb — 750,000
3. Total — 1,750,000

Do not click the Silo at 1.1M gold unless a teammate is holding the 750k. A naked Silo is a billboard. Hydrogen adds 5,000,000 on top of a Silo you already own (6M if you still need the Silo). MIRV is an endgame bank: 25M for the first, then +15M each extra in that match.

Silos go on cooldown after a MIRV in v33. A second nuke needs another ready Silo or a later window. See nukes and v33.

SAM versus Hydrogen

Plan	Gold	What it buys
First SAM	1.5M	One interceptor, ~30s to finish
Two SAMs	1.5M + 3M = 4.5M	Two sites, still under one Hydro
Hydrogen Bomb	5M	One large strike, plus Silo if missing
First Atom plan	1.75M	Silo + Atom

SAM wins the wallet fight against a single Hydro if both launchers finish before impact. SAM loses if you start after the warning. Hydro wins if the defender never paid the 1.5M. In teams, treat 5M as a shared bank, not one player’s toy.

v33 lets SAMs treat in-flight MIRV warheads as normal intercept targets. That does not make MIRV cheap to stop — it makes a 0-SAM late game suicidal against a 25M click.

Gold versus troop cap

Prices sit next to another resource: troops. Growth peaks near 42% of cap. Each City level is +250k cap. Spending your last 125k on a City while two borders are attacking is still often correct; spending it on a third Factory while you sit at 90% cap with no rail is not. Win remains ~80% non-fallout land, with Overtime after minute 30 in FFA lowering the bar. Doomsday Clock waves (not a circle) can force expansion even when you wanted to save for 5M.

Alliance duration is about five minutes; betrayal applies 30 seconds of half defense. Do not time a 1.75M Atom plan to land during your own betrayal window unless that is the point.

Worked spend orders (not gospel)

Inland FFA: City 125k → Defense Post 50k on the choke → second City 250k → Factory 125k if no Port yet (or 250k if you already bought a Port) → Silo only after 1.75M is real.

Water FFA: City 125k → Port 125k → Warship 250k if the sea is contested → City 250k → SAM 1.5M if an enemy Silo appears.

Teams: Split the shared Port/Factory counter across players. One partner should not eat both 125k and 250k in the pair while the other is broke. Assign who banks the 5M Hydro.

When the table is not enough, go back to buildings for placement and nukes for yield. Keep hotkeys beside this sheet so 1–0 matches the row you just paid for. Other lookup pages live on the Tools Hub.