Frostpunk 2’s Endless Mode is Utopia Builder: a sandbox that keeps running past the point where a scenario would end. That is also what makes it unforgiving. An order that gets you through the story’s fixed crises quietly fails at week 300, because the two systems that decide long runs — district-level heat and the factionfaction. An in-game group or nation players can align with or fight against, with its own goals and reputation system. skill trees — did not exist when most build orders were written.
What this covers: a build order and crisis-branching framework for Utopia Builder, described against Patch 1.5.4 (18 February 2026). Why it matters: the 1.3 heat rework and the Fractured Utopias faction Utopias changed how heat is allocated and how factions reward good relations, so orders written before them overbuild fuel. Who should care: Stewards running stretched timelines who have to choose between two conflicting demands at once.
Which patch this guide describes
Utopia Builder’s rules have been adjusted repeatedly, so pin the version. This piece describes the state of play after Patch 1.5.4, released 18 February 2026, which is a bug-fix and balance pass over the Fractured Utopias expansion baseline. Fractured Utopias launched on 8 December 2025, with its patch 1.5.0 following on 11 December 2025, and the underlying heat system was reworked earlier, in the free Major Content Update of 8 May 2025.
That matters for three reasons:
- The 8 May 2025 update is where “temperature management now takes place at the district level”, per 11 bit studios’ press release, alongside the new The Pit map, Tales from the Frostland, Serenity Mode (mild weather, plentiful resources, no faction conflict) and Frostkit 1.0.
- Fractured Utopias, announced as forging the Utopia Builder mode, gives each faction “a defined ideological Utopia – represented by a skill-tree powered by affinities”, with 12 unlocks per faction and 8 new faction hubs. The free part of 1.5.0 added 13 centrist policies.
- Patch 1.5.4 is a corrections pass, not a rework: it fixes specific interactions such as the Goods Emporium proximity effect “now stack[ing] with Heat Auctions instead of overwriting it”, and warm-output modifiers failing to apply to a Logistic District already affected by Proving Grounds.
If you are on an older save, expect the heat bonuses you planned around to resolve differently.
The Endless Mode build order
A base Utopia Builder game gives you seven maps and three Ambitions — Colonise the Frostland, Develop a Metropolismetropolis. The largest tier of a player-grown settlement/node; a major economic and political hub in the world., and Build a Prosperous Future — and the deposits are semi-randomised, so no order is scripted. The sequence below is the one the Steam Community’s Captain-difficulty Utopia Builder guide (by TheMoniker1, updated for Fractured Utopias) argues for, matched to the district and law mechanics on the current wiki.
| Order | What you build | Why it comes here | What breaks if you skip it |
|---|---|---|---|
| Week 1 | Council Hall, Central District | No upkeep and it cannot be disabled; every survival law is voted through it | You cannot pass Heat Auctions or a food law |
| Week 1–5 | Three Housing districts, frostbroken next to the Generator and each other | Housing costs 200 Prefabs per district; clustering stacks Generator Warmth and heat-sharing | Unhoused citizens die from Cold |
| Week 1–5 | Two Extraction districts: one on fuel, one on materials | Fuel keeps the Generator running; materials feed prefabs and goods | Fuel stock runs out and the first cold snap freezes the city |
| Week 1–5 | One Industrial district set to Prefabs | Prefabs are the binding constraint on every later district | Expansion stalls after the third district |
| Week 5 | Research Institute | Unlocks the Idea Tree; research should never sit idle | You fall behind on insulation and the Generator upgrade |
| Week 5–15 | Logistics district at an Old Waystation | Unlocks expeditions; a large frostland fuel find can outvalue a city district | No scouting, no second fuel source, no cores |
| Week 15–50 | Food district on Fertile Soil | A base Food District produces 60 Food, an Expanded one 80 | Hunger compounds into disease and lost workforce |
| Week 20–50 | Heat Auctions, then Heatpipe Watch | Heat Auctions pays +1 Heatstamp per Warm Housing District; Heatpipe Watch adds +1 Temperature Level in all Housing Districts | You cannot fund expansion, and housing leaks heat |
| Week 50–110 | Insulation, Generator upgrade, Settlement Heating | Insulation costs 50 Heatstamps and 50 Prefabs for one full level, upgraded to two retroactively | The first Whiteout outruns your fuel supply |
The same guide’s research order — Coal Mine, then Hothouse or Sawmill, then Heat Utilization, then Factories — is a decent default for the first 50 weeks, with the caveat that a promise to a community may pull you off it.
Heat and food sustainability over a long run
Heat is a fixed-supply resource, not a stockpile, so it cannot be banked. Since patch 1.3 every district has its own Temperature level, and a district can take a maximum of five heat levels from the Generator; in The City only, each Progress Generator upgrade raises that ceiling by one, to eight at the highest upgrade. When fuel or Generator Capacity cannot meet city-wide demand, you choose which districts freeze.
Two levers make that choice cheaper:
- Heat-sharing. A Warm district gives +1/4 Temperature Level per adjacent tile to its neighbours, up to +9/4. A chain of warm districts can become self-sustaining — the second district feeds heat back into the first — so a row of adjacent warm housing holds temperature while consuming less allocation. The Generator itself provides the same “Generator Warmth” bonus of +1/4 level per adjacent tile.
- Insulation. Once researched, a district can be insulated for 50 Heatstamps and 50 Prefabs. The base upgrade permanently adds one full temperature level; the upgraded research raises that to two, and it applies retroactively to districts already insulated.
Food scales more simply. A Food District must be built on Fertile Soil and produces 60 Food base, 80 expanded, with one and then two building slots. Those slots hold Hothouses, and the hothouse you can research is gated by your city’s ideology: the neutral Drum Hothouse demands Heat, the Adaptation Biowaste Hothouse makes more Food with less Heat but more Workforce and Disease, and the Progress Chemical Hothouse makes less Food but needs less Workforce and adds Squalor.
The efficiency comes from matching the law to the building. Chemical Additives gives +25% efficiency to all food-producing districts and buildings and +35% to Chemical Hothouses, at the cost of +4 Disease. Foraged Additives works the other way, adding +0.002 Food/Day per capita in calm weather — against a default consumption of −0.02, effectively a 10% reduction in food need — and +35% on Biowaste Hothouses. Leaving the Food Additives issue alone long enough adds Disease instead.
Stockpiling is the buffer between these two systems. Coal, Oil, Food and Materials are stockpiled separately per location; when a stockpile is full, output from every source is automatically curtailed, and when it is empty, districts shut down. Patch 1.1.0 unified the stockpile limit in Colonies between Scenario and Utopia Builder at 30,000, so plan colony buffers around that figure.
District placement under Utopia Builder rules
Placement is where the heat and food systems collide. Two rules do most of the work:
- Cluster what shares heat. Housing next to the Generator and to other Housing is the cheapest heat you will ever get, because both Generator Warmth and district heat-sharing push in the same direction. The wiki’s chain example is the version to copy on a long run: a line of warm districts lifting one another so allocation can be cut without losing temperature.
- Separate what pollutes. Building a Food or Housing district next to an Industrial, Extraction or Logistics district generates Disease in the city. That adjacency malus is why a tidy industrial quarter beats a compact mixed one in Endless Mode.
Districts can also be expanded once (+3 tiles, a higher output, and a second building slot) for 50 Heatstamps and 50 Prefabs, and their area can be adjusted for the same price to chase a new resource deposit without rebuilding. Because deposits are semi-randomised, the guide’s advice to frostbreak with your expanded nine-tile footprint in mind — not the district you are placing now — is the difference between a +2 heat proximity bonus later and a district that has to be moved. The site’s own district heat and adjacency guide goes deeper on the heat-sharing chain.
Faction balance over a stretched timeline
In Utopia Builder, The City starts with three Communities; you choose them from the Zeitgeist axes of Technology, Economy and Society, and each begins with roughly an equal share of the population. After the city has moved far enough toward any one ideology, a Faction forms that supports it, drawing members from the Communities that share that ideology. With Fractured Utopias, you can instead pick a faction from the start — and eventually a second Faction forms to oppose the first, taking its members from the other Communities.
That second faction is what turns a long run into a political problem rather than a heat problem. On the Council, the 100 Delegates divide by population share, most laws need 51 votes, and the Rule laws in the Order and Authority tracks need 67. Factions always vote For their own ideology and Against the opposing one, and they refuse to negotiate on laws in those two camps — only Communities are flexible. With the Rule Laws specifically, votes track your relations with each group, so a single negative Trust modifier can sink a supermajority no matter how high your overall Trust is.
The Fractured Utopias faction skill tree changes the pay-off for staying friendly. As you gain trust you unlock specialised laws, buildings and abilities, and unlocking every tier lets you enact a singular vision that — in 11 bit studios’ words — is “binding the entire city to one future, and promising to resolve all Tension… permanently”. Patch 1.1.0 also fixed the underlying incentive by making factions “provide proper bonuses to the city if the Steward maintains good relations”.
One timeline trap: the 13 centrist policies added in the free 1.5.0 update shrink faction size by between 1% and 2% when active. Centrism is a legitimate way to defuse a faction you cannot satisfy — but it also erodes the delegate bloc you may be relying on, so read it as a vote-counting tool, not a neutral one.
Crisis response: branching when two demands conflict
Two demands conflict when they compete for the same lever. In Endless Mode that happens most often in two shapes, and each has a clean branch point.
| Collision | Demand A | Demand B | The branch you actually choose |
|---|---|---|---|
| Surplus Heat issue | Heat Auctions — +1 Heatstamp per Warm Housing District, +9 Merit | Heated Commons — 20% fewer unhoused die from Cold, +5% Trust, +9 Equality | Can’t have both. If Heatstamps is the binding constraint, take Heat Auctions; if cold deaths are, take Heated Commons |
| A cold snap during a food drawdown | Heat allocated to Housing to stop cold deaths | Heat allocated to the Food District, which carries its own Heat demand | Insulate Housing (permanent, 50/50), pass Heatpipe Watch for +1 level, then move the freed allocation to Food; accept cold workplaces instead of cold homes |
| Two factions demand opposite laws | Faction A’s favoured law (its delegates vote For, cannot be negotiated) | Faction B’s opposing law (same delegates vote Against) | Only one law per issue can be active, so pick the larger bloc or the faction whose Devoted perk you need, and buy the Communities with promises |
The Surplus Heat fork is the cleanest teaching case: Heat Auctions and Heated Commons sit on the same issue, and the wiki is explicit that only one Law per issue can be in force. They are not a balance to be struck — they are a fork, and the metric that should decide it is which resource is scarcer this decade, Heatstamps or unhoused citizens.
For the faction fork, remember the negotiating limits. You can hold only three active Promises at once and only one per group, so the question is not “can I satisfy both factions” but “which two promises do I spend, and who do I default on”. The site’s council voting breakdown explains the 51/67 thresholds, and its promise-chaining guide covers what happens when you over-promise across a stretched timeline.