City anatomy

Every building has a job.

Infrastructure establishes the rules of the city: where souls arrive, how Hellfire travels, which districts grow, and whether residents remain loyal when pressure rises.

Core infrastructure

The infernal toolkit

Current prototype balance. Upkeep, income, and environmental values apply per simulation cycle. Construction times are active game time and may change during balancing.

Soul Gate

Receives every soul wave and dispatches carts into the road network.

Unlock

Ring I · starting building

Type

Unique · protected · 5×5

Base soul wave

12 → 180 souls / 30 sec

Base gate buffer

80 → 1,000 souls

Cart capacity

8 souls

Black Seat

Administrative heart of the domain. Zoned growth must connect to its road network.

Unlock

Ring I · starting building

Type

Unique · protected · 4×4

Hellfire

4 consumption

Network role

Anchors connected growth

Ember Reactor

Generates the Hellfire that powers buildings, services, and district growth.

Unlock

Ring I · 3×3

Build

250 Obols · 45 sec

Upkeep

6 Obols / cycle

Output

60 Hellfire

Emission

10 Ash / cycle

Repeat cost

+15% each reactor

Soul Store

Buffers deliveries so processing districts survive uneven soul waves.

Unlock

Ring I · 3×3

Build

180 Obols · 30 sec

Upkeep

2 Obols / cycle

Hellfire

4 consumption

Capacity

160 souls

Grand Cult Basilica

Regional cult service for the enormous upper-caste city.

Unlock

Ring VI · 4×4

Build

65,000 Obols · 10 min

Upkeep

170 Obols / cycle

Hellfire

210 consumption

Jobs

8 Imps · 16 Lesser · 4 Nobles

Service

Cult · road range 80

Void Purifier

Regional environmental service for mature, heavily industrialized sectors.

Unlock

Ring VI · 4×4

Build

60,000 Obols · 9 min

Upkeep

160 Obols / cycle

Hellfire

200 consumption

Jobs

14 Imps · 10 Lesser

Cleaning

−30 Ash · −20 Corruption

Radius

24 tiles

Eternal Carnival

High-capacity entertainment for a late-game metropolis.

Unlock

Ring VI · 4×4

Build

55,000 Obols · 9 min

Upkeep

150 Obols / cycle

Hellfire

190 consumption

Jobs

12 Imps · 12 Lesser · 2 Nobles

Service

Entertainment · road range 80

Buildings that evolve

One lot. Several visible stages.

Zoned buildings grow through five tiers. Great Projects are completed in four permanent construction phases. Each development family below has its own section with every appearance and the binding prototype statistics.

Zoned growth · Housing

Brood: from pit to spire

Brood lots house the infernal population. Higher tiers add room for Lesser Demons, Hell Nobles, and finally Archdemons without changing the original 2×2 lot.

Starting building · Tier I

Imp Pit

The humblest demonic dwelling: cheap to operate and large enough for eight Imps.

Zone unlock

Ring I

Lot

2×2 · grows automatically

First build

20 seconds

Brood tier statistics

Tier	Building	Housing	Hellfire	Upkeep	Build / upgrade
I	Imp Pit	8 Imps	2	1 Obol / cycle	20 sec
II	Bone Barracks	10 Imps · 2 Lesser	5	2 Obols / cycle	40 sec
III	Obsidian Eyrie	14 Imps · 6 Lesser	10	4 Obols / cycle	60 sec
IV	Dread Citadel	20 Imps · 12 Lesser · 4 Nobles · 1 Archdemon	18	8 Obols / cycle	90 sec
V	Eternal Brood Spire	32 Imps · 20 Lesser · 10 Nobles · 2 Archdemons	30	14 Obols / cycle	150 sec

Shared growth gates: Tier II needs demand 40 and 60 stable seconds; Tier III demand 60 and 120 seconds; Tier IV demand 75, an Obsidian Road, Order and Cult coverage, pollution ≤32, and 180 seconds; Tier V demand 85, a Hell Avenue, Order and Cult coverage, pollution ≤24, and 300 seconds. City-ring and route requirements also apply.

Zoned growth · Industry

Work: the furnaces of growth

Work lots create Imp and Lesser-Demon jobs and produce Obols. Their output grows quickly, but so do Hellfire demand and Ash pollution.

Starting building · Tier I

Slag Works

A basic industrial forge that turns eight Imp jobs into a modest flow of Obols.

Zone unlock

Ring I

Lot

2×2 · grows automatically

First build

20 seconds

Work tier statistics

Tier	Building	Jobs	Income	Hellfire	Ash	Upkeep	Build / upgrade
I	Slag Works	8 Imps	10	5	5	1	20 sec
II	Bone Manufactory	10 Imps · 2 Lesser	25	10	9	3	40 sec
III	Hell Foundry	14 Imps · 6 Lesser	45	18	14	6	60 sec
IV	Leviathan Forge	22 Imps · 12 Lesser	100	32	22	12	90 sec
V	World Forge	34 Imps · 20 Lesser · 4 Nobles · 1 Archdemon	210	54	34	24	150 sec

Shared growth gates: Tier II needs demand 40 and 60 stable seconds; Tier III demand 60 and 120 seconds; Tier IV demand 75, an Obsidian Road, Order and Cult coverage, pollution ≤32, and 180 seconds; Tier V demand 85, a Hell Avenue, Order and Cult coverage, pollution ≤24, and 300 seconds. City-ring and route requirements also apply.

Zoned growth · Processing

Torment: souls become revenue

Torment lots consume delivered souls and convert them into income. Every tier expands processing capacity, staffing, Hellfire use, and Corruption.

Starting building · Tier I

Pain Chamber

The first processing chamber consumes four souls every ten seconds when staffed, powered, and supplied.

Zone unlock

Ring II

Lot

2×2 · grows automatically

First build

20 seconds

Torment tier statistics

Tier	Building	Jobs	Souls / 10 sec	Input buffer	Hellfire	Corruption	Upkeep	Build / upgrade
I	Pain Chamber	6 Imps	4	8	6	4	2	20 sec
II	Soul Mill	8 Imps · 2 Lesser	8	16	14	8	5	40 sec
III	Cathedral of Agony	10 Imps · 4 Lesser	14	28	26	13	9	60 sec
IV	Soul Refinery	16 Imps · 8 Lesser	24	48	44	21	17	90 sec
V	Endless Agony Engine	24 Imps · 14 Lesser · 2 Nobles	40	80	72	32	30	150 sec

Shared growth gates: Tier II needs demand 40 and 60 stable seconds; Tier III demand 60 and 120 seconds; Tier IV demand 75, an Obsidian Road, Order and Cult coverage, pollution ≤32, and 180 seconds; Tier V demand 85, a Hell Avenue, Order and Cult coverage, pollution ≤24, and 300 seconds. City-ring and route requirements also apply.

Zoned growth · Administration

Pact: contracts at infernal scale

Pact lots employ higher castes and generate strong Obol income without soul deliveries. Their price is increasing Corruption and heavy late-game upkeep.

Starting building · Tier I

Pact Office

A compact office for four Lesser Demons and the first profitable contract economy.

Zone unlock

Ring III

Lot

2×2 · grows automatically

First build

20 seconds

Pact tier statistics

Tier	Building	Jobs	Income	Hellfire	Corruption	Upkeep	Build / upgrade
I	Pact Office	4 Lesser	36	8	3	4	20 sec
II	Pact Exchange	8 Lesser	80	18	6	8	40 sec
III	Abyssal Chancery	12 Lesser	150	32	10	14	60 sec
IV	Infernal Palace	18 Lesser · 6 Nobles · 1 Archdemon	280	56	17	26	90 sec
V	Eternal Contract Palace	24 Lesser · 12 Nobles · 2 Archdemons	520	90	26	48	150 sec

Shared growth gates: Tier II needs demand 40 and 60 stable seconds; Tier III demand 60 and 120 seconds; Tier IV demand 75, an Obsidian Road, Order and Cult coverage, pollution ≤32, and 180 seconds; Tier V demand 85, a Hell Avenue, Order and Cult coverage, pollution ≤24, and 300 seconds. City-ring and route requirements also apply.

Great Project · Four phases

Obsidian Backbone

The region’s logistics megaproject. Every phase increases Obsidian Road capacity and cart speed.

Starting appearance · Phase I

Foundation

Foundation pylons establish the first high-capacity route through the region.

Unlock / footprint

Ring V · unique 5×5

Build the site

20,000 Obols · 5 min

Operation

80 upkeep · 120 Hellfire

Jobs

20 Imps · 10 Lesser

Obsidian Backbone phase statistics

Phase	Construction cost	Souls	Time	Permanent effect
I · Foundation	25,000 Obols	2,000	15 min	+2 road capacity · carts 105%
II · Conduits	60,000 Obols	5,000	30 min	+4 capacity · carts 110%
III · Spire	140,000 Obols	10,000	45 min	+7 capacity · carts 115%
IV · Nexus	300,000 Obols	20,000	60 min	+10 capacity · carts 125%

Construction rule: Phase progress advances only while the site is active, powered, and at least 50% staffed. Completed phases and their effects remain permanent.

Great Project · Four phases

Cathedral of a Thousand Screams

A monumental cult center that extends coverage, raises prestige, and stimulates Pact demand—while also increasing authority expectations.

Starting appearance · Phase I

Crypt

The crypt creates the first regional resonance for Cult service and prestige.

Unlock / footprint

Ring V · unique 5×5

Build the site

24,000 Obols · 6 min

Operation

90 upkeep · 140 Hellfire

Jobs

16 Imps · 16 Lesser

Cathedral of a Thousand Screams phase statistics

Phase	Construction cost	Souls	Time	Permanent effect
I · Crypt	30,000 Obols	3,000	20 min	+2 Cult range · +1 authority target · 102% prestige · +2 Pact demand
II · Nave	75,000 Obols	7,000	35 min	+4 range · +2 target · 105% prestige · +4 demand
III · Choir	175,000 Obols	14,000	50 min	+6 range · +3 target · 110% prestige · +7 demand
IV · Scream Crown	350,000 Obols	26,000	75 min	+8 range · +5 target · 115% prestige · +10 demand

Construction rule: Phase progress advances only while the site is active, powered, and at least 50% staffed. Completed phases and their effects remain permanent.

Great Project · Four phases

Soul Current

A regional soul-distribution network that expands global storage, every Soul Store, and the Soul Gate buffer.

Starting appearance · Phase I

Reservoir

The first reservoir gives the city breathing room between incoming waves and processing demand.

Unlock / footprint

Ring V · unique 5×5

Build the site

30,000 Obols · 6 min

Operation

100 upkeep · 150 Hellfire

Jobs

18 Imps · 14 Lesser

Soul Current phase statistics

Phase	Construction cost	Souls	Time	Permanent effect
I · Reservoir	35,000 Obols	4,000	20 min	+800 regional · stores 110% · gate +200
II · Arteries	90,000 Obols	9,000	40 min	+2,000 regional · stores 125% · gate +500
III · Pumps	220,000 Obols	18,000	60 min	+4,500 regional · stores 150% · gate +1,000
IV · Confluence	450,000 Obols	35,000	90 min	+9,000 regional · stores 200% · gate +2,000

Construction rule: Phase progress advances only while the site is active, powered, and at least 50% staffed. Completed phases and their effects remain permanent.

Great Project · Four phases

Mint of the Abyss

The fiscal megaproject: stronger Pact income, a higher tax ceiling, and a larger safe debt margin.

Starting appearance · Phase I

Assay Floor

The assay floor begins standardizing contracts and squeezing more value from Pact districts.

Unlock / footprint

Ring V · unique 5×5

Build the site

32,000 Obols · 7 min

Operation

110 upkeep · 160 Hellfire

Jobs

12 Imps · 20 Lesser

Mint of the Abyss phase statistics

Phase	Construction cost	Souls	Time	Permanent effect
I · Assay Floor	40,000 Obols	3,500	25 min	Pact income 105% · tax cap 21% · debt +1,000
II · Coin Vaults	110,000 Obols	8,000	45 min	Income 110% · cap 23% · debt +2,500
III · Contract Press	260,000 Obols	16,000	70 min	Income 120% · cap 26% · debt +5,000
IV · Sovereign Die	550,000 Obols	32,000	100 min	Income 135% · cap 30% · debt +10,000

Construction rule: Phase progress advances only while the site is active, powered, and at least 50% staffed. Completed phases and their effects remain permanent.

Great Project · Four phases

Crown Gate

An extension of the Soul Gate that permits larger soul waves and improves rewards from completed mandates.

Starting appearance · Phase I

Gate Foundation

The foundation stabilizes the gate for safer intake and better mandate administration.

Unlock / footprint

Ring V · unique 5×5

Build the site

35,000 Obols · 7 min

Operation

120 upkeep · 180 Hellfire

Jobs

14 Imps · 18 Lesser

Crown Gate phase statistics

Phase	Construction cost	Souls	Time	Permanent effect
I · Gate Foundation	45,000 Obols	5,000	30 min	Wave maximum 100% · mandate rewards 105%
II · Regulator Ring	125,000 Obols	11,000	50 min	Wave maximum 125% · rewards 110%
III · Mandate Throne	300,000 Obols	22,000	75 min	Wave maximum 150% · rewards 120%
IV · Crown Aperture	650,000 Obols	42,000	120 min	Wave maximum 175% · rewards 135%

Construction rule: Phase progress advances only while the site is active, powered, and at least 50% staffed. Completed phases and their effects remain permanent.

Great Project · Four phases

Leviathan Furnace

A brutal regional power plant. Each phase supplies far more Hellfire and releases correspondingly more Ash.

Starting appearance · Phase I

Firebox

The firebox already outproduces ordinary reactors, but begins the project’s environmental debt.

Unlock / footprint

Ring V · unique 5×5

Build the site

40,000 Obols · 8 min

Operation

140 upkeep · 200 Hellfire

Jobs

24 Imps · 12 Lesser

Leviathan Furnace phase statistics

Phase	Construction cost	Souls	Time	Permanent effect
I · Firebox	45,000 Obols	5,000	30 min	+200 Hellfire · +18 Ash / cycle
II · Ribbed Boilers	120,000 Obols	12,000	50 min	+450 Hellfire · +35 Ash / cycle
III · Leviathan Heart	280,000 Obols	25,000	80 min	+800 Hellfire · +60 Ash / cycle
IV · World Flame	600,000 Obols	45,000	120 min	+1,400 Hellfire · +100 Ash / cycle

Construction rule: Phase progress advances only while the site is active, powered, and at least 50% staffed. Completed phases and their effects remain permanent.