What Do Factories Do in OpenFront: The Train Economy Explained

What a factory does and when to build one

A Factory launches Trains into a connected rail network. The income arrives when a Train completes a stop at a City or Port. A stop at another Factory produces no trade payout. That distinction explains why an isolated Factory can be an expensive disappointment: buying the departure building does not create a useful destination. Before spending, check that the placement preview offers a real connection and that the connected network contains a City or Port where trade is allowed. You do not need to own every destination yourself, but you do need a usable route and a relationship that permits the journey.

Start with the buildings and territory you already have. A protected City near a suitable Factory position can support a first rail route without another exposed expansion. A distant City may require intermediate connections. A coastal Port may participate in rail trade as well as sea trade, but each income path has its own requirements. Avoid judging the Factory solely by the number of nearby icons. The important observation is a completed train journey with a paying stop. If that has not happened, adding more Factory levels may increase your spending without resolving the missing link.

Your first purchase should solve the present bottleneck. If you have a safe route and need more income, a Factory can be useful. If an enemy is about to overrun the route, reserve troops and defense may matter sooner. If the only coast lacks a valid foreign Port, buying a Port is not an automatic alternative income source. Ships must complete eligible voyages too. A City helps population capacity and can become a paying rail station; it does not hand out an unconditional building stipend merely because it exists. Compare functioning systems, not building names.

Use one small test before expanding the investment. Place the first building where the preview and your defenses support it, watch the connection form, then observe whether trains reach the expected stops. Note which owner receives the train, whether the route crosses a vulnerable border, and whether another player can interrupt it. The result tells you whether the next purchase should be another departure level, a better destination, or protection for the route you already bought. A successful first connection is evidence that the layout works, not a guarantee that every later purchase has the same return.

This page answers the basic purpose of a Factory. For the separate decisions, use Factory upgrades when comparing levels, Factory count when choosing additional locations, and Port versus Factory when comparing two working trade options. Keep the question narrow: which purchase creates or improves a route you can actually use during this match?

Follow the gold through a completed stop

A Train and a station can have different owners. The standard base payment depends on the relationship between them when the stop is processed. Your own station has a base of 10,000 Gold, a teammate’s or another eligible player’s station has 25,000, and an ally’s station has 35,000. These are starting amounts before the train’s accumulated stop penalty and the applicable Gold multiplier. They are not a promised payment every second, nor a reward for every tile traveled. No arrival means no payment from that stop, however attractive its base amount looks on paper.

Destination relationship	Base payment before adjustments
Your own City or Port	10,000 Gold
Teammate or other eligible player	25,000 Gold
Ally	35,000 Gold
Factory	No stop payment

When the destination belongs to someone else, the station owner also receives the calculated amount. The train owner still receives their payment; the amount is not simply split in half. This creates a reason to protect useful shared routes, but it does not make every alliance a good investment. A remote allied station may take longer to reach, sit beyond a dangerous border, or disappear during a fight. A modest domestic route you can defend may be more dependable than a richer stop that rarely completes. Evaluate completed payments and the route’s survival together.

The penalty follows the number of paying stops already visited by that Train. The first ten paying stops avoid this reduction. Later paying stops reduce the base by 5,000 per additional stop, with a floor of 5,000 before the applicable multiplier. This counter is not geographical distance. A long rail segment does not itself count as several paying stops, and returning toward familiar territory is not a promise that the counter resets. Do not estimate income by calling every visible circuit a fresh, penalty-free loop. Track the journey and the payments actually completed.

Nor can you instruct every Train to visit the most profitable four stations in your preferred order. The network and automatic destination selection determine its journey. Four Cities drawn near a Factory are four possible useful stations, not a guaranteed package of four payments from every departure. This is why multiplying a station count by a spawn estimate can badly overstate income. Travel, routing, stop history, trade eligibility, and interruptions all separate the theoretical payout table from the Gold you can spend now.

For a practical check, compare the same route before and after one change. Add a defensible connection or protect an existing destination, then watch several completed arrivals rather than one lucky train. If income changes, ask whether the improvement came from more departures, better destinations, or fewer interruptions. That distinction helps you buy the next useful improvement instead of repeatedly increasing levels because the Factory is the most visible part of the system.

Connect stations before adding levels

Rail placement checks nearby buildings and then looks for a usable path. The current station search range is 110 tiles, while the maximum length considered for an individual rail path is about 155.56 tiles. These describe different checks. The first is a nearby-building search; it is not a rule that every train’s entire journey must remain within 110 rail tiles of its original Factory. A network can connect through intermediate stations and carry journeys beyond the area around one departure point. Conversely, a nearby icon alone does not guarantee a route through the actual terrain.

The normal connection logic also skips neighboring stations at distances of 15 tiles or less. Those stations remain separate buildings; they are not merged into one economic object. Crowding them together therefore is not a reliable way to force a new rail connection. Preview the proposed placement instead of assuming that closer is always better. The shape of existing rails, pathfinding, neighboring stations, and reachable network can affect what appears. When the preview lacks the intended line, investigate the layout before committing the construction cost or attempting to repair the problem through upgrades.

A completed Factory becomes a train station and can bring nearby Cities and Ports into the rail network. A City or Port checks for a nearby Factory when joining this system. This makes construction order and the existing layout relevant, but it does not mean you buy a separate railroad as an ordinary building. Connections are formed by the game. Your practical controls are the locations and levels of eligible structures, their protection, and the trading relationships involved. Look at the rail that actually appears rather than imagining a line between two points on the map.

Consider a City beyond a Factory’s direct search range. Upgrading the Factory does not enlarge that search range. Another valid station connection may extend the network, but it must itself meet the game’s placement and path requirements. This is a layout decision, not a promise that dropping an arbitrary intermediate building repairs every gap. Before building, compare the cost of the additional structure with the value of the whole route and the time left in the match. An exposed bridge between two profitable regions may demand more defense than the income can justify.

When a rail economy stops working, inspect it in order: departure building, visible connections, eligible paying destination, then safety. If there is no eligible destination in the connected cluster, the Factory does not launch new trains into an empty network merely to burn Gold. Fix the connection or destination first. If trains leave but payments are disappointing, inspect the later stages of the journey. The rail network guide covers layout choices beyond this first working connection; use it after you have identified which link is missing.

Understand upgrades without treating spawns as a timer

Factories create trains automatically when they have an eligible destination. A Factory has a minimum cooldown of ten ticks between its own successful departures, equal to one second at the normal tick rate. Passing that cooldown does not guarantee an immediate train. Spawning also uses probability checks, and the result depends on your total Factory levels and the worldwide Train population. The cooldown is therefore a minimum spacing, not a fixed timetable. Observing a pause longer than one second does not by itself mean that a Factory is broken or that the train must have been intercepted.

Each Factory level gives that building another chance during its spawn check. The starting probability denominator is based on your total Factory levels, with the form (levels + 10) × 15 before the other adjustments. As your total levels increase, that denominator also increases. An upgrade adds checks, but it does not improve the success chance of each individual check simply because the building is taller. The combined result and the local distribution of those levels determine departure frequency. Avoid the claim that ten levels must produce exactly ten times the useful income of one level.

Version 35 gives a spawn boost to the first few Factory levels of a player. The boost is strongest at one level and fades out by six total levels. That helps a small or damaged economy restart. It does not mean that the seventh level stops working, nor that a player should destroy useful factories to keep the bonus. More levels still add departure opportunities overall, while the value of an individual purchase depends on route quality, the shared construction price, and what else that Gold could achieve. The same version change also helps small Port economies through their own ship system.

Worldwide Train saturation is another input. More Train units across the game can reduce departure frequency, even when your local rail layout has not changed. Train saturation does not directly lower the base payment for a particular station arrival. That payment has its own relationship, stop-count, and multiplier rules. Keep these effects separate: fewer departures and smaller payments are different observations, so they call for different checks. More destinations might improve routes, but adding arbitrary stations is not a universal cure for global saturation, just as upgrading every Factory is not a universal cure for a missing connection.

When deciding whether to upgrade, first confirm that existing trains complete useful journeys. Then compare one additional level with an alternative location, a destination, or defense. Do not promise a fixed payback time from the denominator alone: it excludes travel and can change with the world fleet. Observe several departures and arrivals in the current match, keep enough resources to defend the network, and stop expanding when the next economic purchase does not help the position you must hold.

Pay for the shared ladder, not a four-level cap

Ports and Factories share a construction cost counter. Cities use their own counter. Under ordinary costs, the Port and Factory sequence starts at 125,000 Gold, then 250,000, then 500,000, and reaches the 1,000,000 price ceiling. That ceiling limits the price of later purchases; it is not a rule that a Factory has only four available levels. A level added to a Port can affect the price of the next Factory purchase, and a Factory level can affect the next Port purchase. Check the displayed price before deciding which option is cheaper for your current position.

Imagine a position with no Ports or Factories. The first Factory costs 125,000. The next shared purchase costs 250,000 whether it is another Factory level or a Port. You do not receive a fresh 125,000 starting price just because you switch building types. If you make four purchases from an otherwise empty shared ladder, the illustrative total is 1,875,000 Gold. That sum is a four-purchase example, not the total price of a fully upgraded economic system. Further levels still cost resources, and the destinations, defenses, and other infrastructure needed for useful income are separate investments.

Normal construction takes 20 ticks for a Factory or City and 50 ticks for a Port, corresponding to two and five seconds at the normal tick rate. These are construction durations, not payback times. A completed Factory still needs a connected eligible destination, then a departure and a journey. A completed Port needs an eligible trade voyage before sea trade pays. A faster building animation does not make the Factory a guaranteed emergency income purchase. If the front is collapsing now, the new structure may never complete enough useful trade to recover the money you diverted from defense.

Separate the marginal purchase from the complete project. A single additional Factory level on a protected, functioning network may need little extra setup. Opening a second location may require a destination and a new line of defense as well. Comparing only the Factory icon’s price hides those differences. Write down what must exist for the proposed purchase to work, then check whether those prerequisites are already present. If they are not, include their costs and their exposure in your decision. Saving the next purchase can be better than paying for the first piece of a project you cannot finish.

Finally, keep a reserve for the action the match may force on you. Economic upgrades compete with troops, protection, and military structures for your attention and Gold. You do not need a universal instruction to stop at a particular Factory count. You need a reason why the next level or location improves the position before the route is lost or the game ends. The shared price ladder makes that question increasingly important as cheap early purchases give way to expensive later commitments.

Compare two layouts without promising a payback time

In the first layout, your protected inland core already contains several Cities and a Factory placement with valid preview connections. An enemy is not immediately threatening the cluster. This is a plausible place to test a first Factory because the destinations and defense are largely present. After construction, verify the rails, watch trains leave, and look for completed arrivals. You are testing whether the existing core can support rail income, not assuming that every nearby City will be visited by every Train or that the entire network pays on a fixed schedule.

For a simple accounting example, an early paying stop at your own City has a 10,000 base payment under standard settings. Thirteen such completed payments would exceed a first Factory’s 125,000 price if there were no other adjustments. This counts payments, not trains or seconds. One Train may complete several stops, others may follow different routes, and later stops can be penalized. The example also excludes the cost of Cities, protection, and any other necessary building. It is useful for understanding the size of the investment, but it cannot justify a promise that the Factory pays back in twenty seconds.

In the second layout, the proposed Factory has no connected eligible City or Port. Perhaps a nearby building is too close for the intended direct connection, a farther one lies outside the search range, or terrain prevents the rail path. Here the first task is to resolve the layout. Adding levels to the isolated Factory does not increase rail search range or supply a destination. Examine an alternative placement or another useful station connection. If the repair needs more Gold than you can defend, postpone the investment rather than treating the already-spent Factory cost as a reason to spend again.

The alternative is not automatically a Port. A Port can earn sea-trade income without rail, but it needs an eligible foreign destination, connected water, and a voyage that completes. A lonely coast without a trading partner does not become profitable merely because rail was inconvenient inland. Compare the actual inland and coastal options available on this map. If neither works, a defensive purchase or a reserve may be the correct next step. The best economic choice can be to wait until territory, relationships, or existing connections make a route viable.

After either test, change one part of the system at a time. If you add a Factory level, do not simultaneously change every destination and then attribute all extra Gold to the upgrade. If a route loses income, check whether ownership or trade eligibility changed before assuming the spawn formula changed. Keep the comparison tied to the decisions you control: placement, levels, safe destinations, and the resources left to protect them. That approach produces a useful local answer even when the wider game’s train population is changing.

Diagnose an idle or disappointing factory

Begin with the symptom rather than buying another level. If you see no new trains, inspect whether the Factory is complete, whether it has joined a rail cluster, and whether that cluster contains an eligible trade destination. A cluster with no useful destination blocks departures. It is not a machine that continually spends Gold launching trains into nowhere. The Gold you risked is the building investment and its opportunity cost. Treating the problem as an imaginary recurring train fee can send you toward the wrong fix and obscure the missing connection you actually need.

If trains depart but you see fewer payments than expected, follow the route. A Factory stop does not pay; Cities and Ports do. Check whether the destination owner or trading relationship changed. A station can be geographically reachable without being a current eligible trade partner. Shared income is valuable, but an attractive allied payment does not justify ignoring the station’s safety or the possibility of losing the relationship. Domestic income may have a smaller base payment while being easier to control. The correct comparison includes completed journeys, not just the highest number in the payout table.

If late payments are smaller, distinguish stop history from distance and spawning. The first ten paying stops of a train avoid the stop penalty; later ones lose 5,000 per additional stop until the pre-multiplier floor applies. A physically long railway is not the same as many paying stops. Likewise, global train saturation affects departure probability, not the relationship’s listed base payout. Do not recommend more stations or a higher Factory level until you have identified whether the issue is an eligible route, the number of departures, the number of arrivals, or the value of each arrival.

If the route repeatedly changes hands, the economic question has become a defense question. Another level in the same exposed location concentrates more investment at risk. A new protected location might diversify that risk, but only if it has useful connections of its own. Sometimes protecting a choke point or keeping troops available is the improvement that allows existing income to continue. The Factory count alone cannot express this tradeoff. A smaller network that survives the next attack may fund more useful decisions than a larger network that collapses before its new trains complete their first trips.

Finish the diagnosis with a measurable observation. After repairing a missing destination, look for a valid departure. After repairing a route, look for arrival at the intended paying station. After upgrading a working Factory, compare several journeys under the same local conditions rather than one moment of Gold growth. If the change did not affect the observed bottleneck, stop adding identical purchases. Return to the connection, ownership, and defense checks, then choose the next action from evidence visible in the current match.

Choose between a factory, a port, and a city

The three buildings can cooperate, but they do not do the same job. A Factory is the source of trains. A City or Port can be a paying destination in the rail network. A Port also supports sea trade, and a City increases population capacity. Neither a City nor a Port gives an unconditional train payment when no Train arrives. A Port’s sea trade is a separate journey-based income path, not a guaranteed fixed stipend. These distinctions keep the basic building decision clear even when several income sources are active at once.

Need in this position	First thing to check
Start train income	Factory placement with a connected eligible City or Port
Improve existing train departures	Additional Factory level and the route’s safety
Open sea trade	Port with a valid foreign trading destination and safe water route
Raise population capacity	City and whether more capacity is the current bottleneck
Repair a broken economy	Missing connection, destination, trading eligibility, or defense

Choose a Factory when a rail network can convert its departures into useful completed stops. Choose a Port when the water route has an eligible partner and a realistic chance of completing voyages. Choose a City when population capacity or a useful station position is the need you are solving. The first building in each type may show the same starting price, but Cities do not share the Port and Factory counter. Do not use that superficial price similarity to conclude that all three remain equally priced throughout the match or that every purchase is economically interchangeable.

An upgrade is also different from a new location. Upgrading a Factory adds departure checks at that node. A new Factory can open or support another part of the network and changes where investment is exposed. A new City can create another potential paying stop if it joins the network; merely adding City levels is not the same as adding a new station or multiplying its base train payment. Begin with the function you need, then choose the building and location that provide it. Counting icons alone misses those differences.

For further reading, use the Factory upgrades guide for levels, the Factory count guide for locations, the rail network guide for connections, and the Port versus Factory guide for competing trade investments. The Gold rates guide is a reference for payment rules. You do not have to read every topic before building once. Make the smallest useful investment, verify its connection and arrivals, and follow the next guide only when that specific decision becomes the obstacle in your match.