Lifeform population and unlock builds.

What these builds measure

These cost-oriented reference endpoints unlock useful research milestones under the stated equilibrium model. They are not universal optimal builds, a cheapest chronological purchase order, or an instruction to demolish higher levels. Retain existing higher levels and meet all prerequisites. The next useful research slot is usually a better target than all eighteen at once.

All Lifeform buildings use zero ordinary planet fields. There is no ordinary-field advantage between these population packages. Least total resources, least weighted resources, fewest upgrades and fastest completion are different goals. Queue speed, growth time, existing buildings and items can change the best next purchase.

The examples assume no population item or research modifier. Species experience boosts technology bonuses, not these population-building effects. Do not add the old Trader population bonus: it was a bug removed in 2023. Species choice is mainly about local building benefits; researched technologies from discovered species can be selected independently.

Research slot population thresholds

Compare each slot against the population of its required tier, not total population. The base table is shared by all species before a Kaelesh Psionic Modulator reduction.

Kaelesh slot requirement = base requirement × (1 − min(0.30, 0.02 × Psionic Modulator level)). Level 11 reduces every threshold by 22%; level 15 reaches the 30% reduction cap. This lowers the requirement, not the actual population counter.

Real first-slot prerequisites

Research-building level 1 opens the tree. Some older population-only starter rows understate farm prerequisites; the levels here include those prerequisites. A first slot still needs the actual 200,000 population counter.

For discovery, use a Human pilot with Intergalactic Envoys level 1 and keep it active somewhere while changing other planets. Launch discoveries through Galaxy view DNA icons, not position-16 expedition missions. A species does not need a permanent planet merely to keep its discovered technologies available. Continue discoveries until the species needed for the planned selections are found; not every mission produces a useful result.

Humans population milestones

Read every building column as a target level, not a purchase sequence. Add the research building and applicable prerequisite chain below. For the all-18 endpoint, additional prerequisites are: Research Centre 5; High Energy Smelting 3; Fusion-Powered Production 2.

Rock’tal population milestones

Read every building column as a target level, not a purchase sequence. Add the research building and applicable prerequisite chain below. For the all-18 endpoint, additional prerequisites are: Rune Technologium 1; Crystal Refinery 6.

Mechas population milestones

Read every building column as a target level, not a purchase sequence. Add the research building and applicable prerequisite chain below. For the all-18 endpoint, additional prerequisites are: Robotics Research Centre 1.

Kaelesh population milestones

Read every building column as a target level, not a purchase sequence. Add the research building and applicable prerequisite chain below. For the all-18 endpoint, additional prerequisites are: Vortex Chamber 5; Bio Modifier 5.

All-18 equilibrium check

Population-package costs

Cumulative level 1 → target population-package costs, excluding prerequisite buildings, normal power infrastructure, all technology research and artefacts. MSU = Metal + 1.5 × Crystal + 3 × Deuterium, corresponding to a 3:2:1 trade ratio. These are modelled resource values, not live quotes or universal exchange rates.

The FAQ’s Rock’tal model is about 10.624063 billion MSU with Megalith and Mineral Research Centre discounts. It is not an exact chronological from-zero bill: applying final discounts retrospectively changes historical costs. The undiscounted row is shown for a clear, reproducible scope; real purchase timing determines the discount obtained.

Per-level building resource cost in the workbook is floor(base resource cost × cost factor^(level − 1) × level), separately for each resource. Sum levels 1 through the target, applying the appropriate current discount when each level is actually bought.

The cheaper Kaelesh population package alone does not establish the best long-term mine or expedition returns. Technology levels, local production buildings, research amplification, power and a player’s activity can outweigh this opening cost.

Dependencies beyond the starter

The Mecha first-T2 milestone includes Microchip Assembly Line 1 because Production Assembly Hall requires it, correcting the population-only FAQ row. Microchip Assembly Line and Chip Mass Production are different buildings. The Rock’tal first-T2 milestone’s extra population helps meet conversion prerequisites; it is not assumed to be a transcription error.

Conversion-building population requirements

A conversion building’s population prerequisite is separate from its 1%-per-level conversion effect. The requirement rises as the building is upgraded. L is the target building level.

These are construction population gates, separate from the tier trained and the population tier required by a research slot. Check the building’s current Techinfo before upgrading.

Reproduce the population model

Let q = housing level, f = food-building level, s = T2 conversion-building level and t = T3 conversion-building level. H = base housing × housing factor^q × (q + 1) × housing multiplier. C = base consumption × 1.15^q × (q + 1) × consumption multiplier. F = base food × food factor^f × (f + 1) × food multiplier.

Sustainable T1 = H × min(1, F/C). T2 = sustainable T1 × s/100. T3 = T2 × t/100. Compare the appropriate tier with its adjusted slot requirement. Use unrounded values internally; displayed counters are approximate because game rounding can differ. C and F are common-scale model values for the food ratio, not a claim about live hourly display units.

• Humans: housing multiplier = 1 + 0.015 × Skyscraper; consumption multiplier = 1 − min(0.80, 0.01 × Food Silo); food multiplier = 1 + 0.05 × Biotech Lab.
• Rock’tal: these population-package multipliers are all 1. Megalith and Mineral Research Centre affect building costs, not this food/housing ratio.
• Mechas: housing multiplier = 1 + 0.02 × Production Assembly Hall; food multiplier = 1 + 0.02 × Microchip Assembly Line; consumption multiplier = 1.
• Kaelesh: housing multiplier = 1 + 0.02 × Chrysalis Accelerator; consumption multiplier = 1 − min(0.50, 0.01 × Antimatter Convector); food multiplier = 1.

Growth, timing and activation

Finished buildings do not instantly activate a slot. The actual tier counter must reach the requirement and remain there. Official version 9.0.3 made population growth independent of server speed, so an ×8 economy does not imply ×8 population growth. A complete current growth-ETA formula has not been independently verified here.

Human Food Silo reduces upkeep while Skyscraper and Biotech Lab support housing and food. Mechas combine housing and food boosters. Kaelesh combines housing, upkeep and requirement reductions; Cloning Laboratory can be a growth-time option but is not needed for the shown equilibrium endpoint. Rock’tal instead gains cost-reduction options whose purchase timing matters.

Unlock tiers without buying unnecessary population

There are eighteen research slots arranged in three tiers. Housing and food support the population; conversion buildings make higher-tier population available. For Humans, Academy of Sciences converts toward tier 2 and Neuro-Calibration Centre toward tier 3. For Rock’tal, the analogous progression uses Rune Forge and Oriktorium. Inspect the population tier required by your target slot: a large tier-1 population does not automatically satisfy a tier-2 requirement.

1. Pick the next useful research slot and write down its displayed population requirement and tier.
2. Price the missing housing, food, research-building prerequisites and conversion levels as one package.
3. Build food and housing support, then the required conversion infrastructure. Check actual tier counters rather than total population alone.
4. Wait for stable population and confirm that the research stays active. A population shortfall can deactivate unlocked technologies.
5. Buy a useful research level and compare the actual gain before pursuing the next population threshold. Do not rush tier 3 simply because a template shows all eighteen slots.

Develop the species buildings in phases

For a mining-oriented Rock’tal pilot, first use Meditation Enclave, Crystal Farm and Rune Technologium to reach the useful early research slots. Then price Magma Forge for metal, Crystal Refinery for crystal and the lifeform Deuterium Synthesiser for deuterium against another ordinary mine level. The lifeform synthesiser is a different building from the normal resource-menu synthesizer.

Before a large development phase, compare the cost savings from Megalith with the cost of buying it. Develop Rune Forge only when a useful tier-2 slot justifies the extra population infrastructure; use the same test for Oriktorium and tier 3. Add Disruption Chamber when the energy benefit or reduced demand solves a measured constraint. This gives a sequence with stop points rather than an unfunded all-buildings shopping list.

An expedition-focused player can still use Rock’tal buildings while selecting expedition technologies discovered from another species. Humans and Mecha deserve comparison when their research-amplifying buildings fit a developed, active account. Species, player class and research selection are not required to match names.

Research and reset references

Price the desired technology before its population package. Research levels, artefact selections and species switches are separate investments.