Dupe Circle
Beneath Dominus Columbia, threaded through every sector like veins through a body, the Dupe Circle was the city's circulatory system. A six-mile loop of tunnels, stairways, open chambers, and branching passages, it connected every district through routing corridors, ventilation shafts, and transit arteries. The designers prized connectivity above all else. Redundancy was the guiding principle. If one route failed, three others carried the load. At its narrowest, the Circle accommodated six or seven people abreast; at its widest, it opened into auditorium-scale chambers where entire communities gathered. By every measure of pre-fall engineering, the Dupe Circle was a triumph of infrastructure planning.
That triumph killed the city. When the Omni Plague breached containment, it found the Dupe Circle waiting like an open highway. The plague did not need to fight through sealed bulkheads or force entry past quarantine doors. The tunnels were built to prevent isolation, and they performed that function with terrible efficiency. Every sector received the contamination simultaneously, carried along the same passages that once moved clean air, people, and supplies. The warm-painted walls, the brass-adorned archways, the mosaic-lined corridors: all of it became a delivery system for extinction.
The tunnels still function, after a fashion. Black residue coats every surface, circulated continuously by whatever mechanical processes survived the collapse. Zombies line the walls, not standing in the passages but fused into the infrastructure itself, twitching in response to vibration and sound. There is no clean section, no safe route, no passage that escaped contamination. The interconnected design meant to be the city's greatest strength ensures that every meter of tunnel is as poisoned as every other. The Dupe Circle breathes plague the way it once breathed air.
That triumph killed the city. When the Omni Plague breached containment, it found the Dupe Circle waiting like an open highway. The plague did not need to fight through sealed bulkheads or force entry past quarantine doors. The tunnels were built to prevent isolation, and they performed that function with terrible efficiency. Every sector received the contamination simultaneously, carried along the same passages that once moved clean air, people, and supplies. The warm-painted walls, the brass-adorned archways, the mosaic-lined corridors: all of it became a delivery system for extinction.
The tunnels still function, after a fashion. Black residue coats every surface, circulated continuously by whatever mechanical processes survived the collapse. Zombies line the walls, not standing in the passages but fused into the infrastructure itself, twitching in response to vibration and sound. There is no clean section, no safe route, no passage that escaped contamination. The interconnected design meant to be the city's greatest strength ensures that every meter of tunnel is as poisoned as every other. The Dupe Circle breathes plague the way it once breathed air.
Purpose / Function
The Dupe Circle was built as the primary body of The Complex, the underground city beneath Dominus Columbia. Its function was threefold: transit, environmental control, and redundancy. Every sector of the city connected to the Circle, and through it to every other sector. If a surface route collapsed or a gate sealed, the underground network guaranteed that no district could be cut off from the rest.
This was not accidental. The builders, a coalition of Genjian caretakers, Full Dead who had claimed the tunnels, and Lascarians who helped expand them, understood that isolation meant death in the wastes. The Circle's branching passages reached Downtown, the Vault of the Pre-Fall Burden, and multiple Federation Complex Gate exits to the surface. Ventilation, transit, power distribution: all of it flowed through the Circle. It was the spine of the city, and every organ depended on it.
This was not accidental. The builders, a coalition of Genjian caretakers, Full Dead who had claimed the tunnels, and Lascarians who helped expand them, understood that isolation meant death in the wastes. The Circle's branching passages reached Downtown, the Vault of the Pre-Fall Burden, and multiple Federation Complex Gate exits to the surface. Ventilation, transit, power distribution: all of it flowed through the Circle. It was the spine of the city, and every organ depended on it.
Design
The Dupe Circle formed a loop roughly six miles in circumference, with underground buildings, stairways, open chambers, and side passages branching off the primary route. The tunnel width varied considerably. At its narrowest points, six or seven people could walk abreast. At its widest, the passages opened into massive auditorium-scale spaces. On average, the tunnels were wide enough for three full-sized trucks to park side by side, a scale that reflected the Circle's role as a transit artery rather than a maintenance crawlway.
The builders decorated the stone and concrete walls with warm colored paint patterns and mosaic work. Each support archway, multiple feet thick, was adorned with hand-hammered brass and copper decorative metalwork. The aesthetic was deliberately warm and enduring, a conscious choice to make the underground feel like a living space rather than a utilitarian passage. For a tunnel network buried beneath the wastes, the Dupe Circle was remarkably beautiful.
Three separate lighting systems kept the tunnels illuminated without combustion. Thin shafts bored from ceiling to surface were filled with clear hardened pre-fall plastic plugs that refracted ambient sunlight into a diffuse glow. A crude magnetic dynamo, turned by underground waterway flow, powered a limited network of electric lights. And in the power housing, natural spring water trickled into a geothermal reservoir where the heat converted it to steam, driving small turbines set in pipes above the pool. The strict no-combustion policy kept the underground air remarkably clean for an industrial-scale tunnel network. Every light source operated without fire, without smoke, without consuming the air its residents needed to breathe.
The builders decorated the stone and concrete walls with warm colored paint patterns and mosaic work. Each support archway, multiple feet thick, was adorned with hand-hammered brass and copper decorative metalwork. The aesthetic was deliberately warm and enduring, a conscious choice to make the underground feel like a living space rather than a utilitarian passage. For a tunnel network buried beneath the wastes, the Dupe Circle was remarkably beautiful.
Three separate lighting systems kept the tunnels illuminated without combustion. Thin shafts bored from ceiling to surface were filled with clear hardened pre-fall plastic plugs that refracted ambient sunlight into a diffuse glow. A crude magnetic dynamo, turned by underground waterway flow, powered a limited network of electric lights. And in the power housing, natural spring water trickled into a geothermal reservoir where the heat converted it to steam, driving small turbines set in pipes above the pool. The strict no-combustion policy kept the underground air remarkably clean for an industrial-scale tunnel network. Every light source operated without fire, without smoke, without consuming the air its residents needed to breathe.
Sensory & Appearance
The air is thick. What was once kept clean by a strict no-combustion policy now carries a persistent particulate weight, coating the throat and lungs within minutes of exposure. Sound behaves wrong in the Circle; the curved tunnel walls and branching passages create unpredictable acoustics where footsteps echo from directions that do not match their source. Every surface is slick with black residue, a gritty crystalline film that has buried the warm paint patterns and brass metalwork beneath a uniform dark crust. In the walls, shapes that were once human twitch at irregular intervals, fused into the stone and concrete, their movements small enough to dismiss as imagination until they are not.
Denizens
The primary occupants of the Dupe Circle are zombies that have become physically fused into the tunnel infrastructure. They are embedded in walls, floors, and machinery, integrated into the architecture to the point where distinguishing corpse from construction requires close inspection that no sane traveler would attempt. These fused undead activate in response to vibration, changes in airflow, or sound. Beyond them, other undead follow residual routing patterns through the tunnels, moving along paths that may once have been transit schedules or patrol routes, converging at junctions with no warning and no predictable frequency.
Hazards & Traps
Every surface in the Dupe Circle is coated in black residue, a byproduct of the Omni Plague's saturation of the tunnel network. The contamination is not static. The Circle's ventilation systems, still partially operational, continue to circulate airborne particulate through the entire loop. Entering any section means breathing whatever the rest of the network is exhaling. There is no upstream, no clean pocket, no segment that escaped saturation.
The fused undead present a different category of threat. Zombies embedded in the walls, floors, and machinery of the tunnel activate in response to vibration, changes in airflow, or sound. They do not patrol. They wait, integrated into the architecture, and they react. Others follow residual routing patterns through the tunnels, converging at junctions with no predictable timing. The combination of continuous airborne contamination and motion-triggered undead means there is no safe method of traversal. The Circle was designed so that every point connected to every other point. That connectivity now guarantees that no section is safer than any other.
The fused undead present a different category of threat. Zombies embedded in the walls, floors, and machinery of the tunnel activate in response to vibration, changes in airflow, or sound. They do not patrol. They wait, integrated into the architecture, and they react. Others follow residual routing patterns through the tunnels, converging at junctions with no predictable timing. The combination of continuous airborne contamination and motion-triggered undead means there is no safe method of traversal. The Circle was designed so that every point connected to every other point. That connectivity now guarantees that no section is safer than any other.
Alterations
Before the Omni Plague, the Dupe Circle was a decorated, functional marvel. Stone and concrete walls bore warm colored paint patterns and mosaic work. Support archways several feet thick were adorned with hand-hammered brass and copper metalwork. Three independent lighting systems, refracted sunlight, magnetic dynamo electrics, and geothermal steam turbines, kept the tunnels illuminated without combustion. The air was clean. The passages were full of people.
What remains is a structural ghost. The brass and copper metalwork is buried under black crystalline residue. The warm paint is invisible beneath contamination. The mosaic work persists only as texture beneath the grime, shapes you can feel but no longer see. The geothermal turbines still spin in the power housing, still generating energy, still driving circulation through the tunnel network. They simply circulate poison now instead of clean air. The transformation is not one of destruction but of corruption. The Circle was not broken. It was turned against itself, its every functional system repurposed by the plague into a mechanism for spreading death through the infrastructure the builders loved most.
What remains is a structural ghost. The brass and copper metalwork is buried under black crystalline residue. The warm paint is invisible beneath contamination. The mosaic work persists only as texture beneath the grime, shapes you can feel but no longer see. The geothermal turbines still spin in the power housing, still generating energy, still driving circulation through the tunnel network. They simply circulate poison now instead of clean air. The transformation is not one of destruction but of corruption. The Circle was not broken. It was turned against itself, its every functional system repurposed by the plague into a mechanism for spreading death through the infrastructure the builders loved most.
History
The infrastructure that became the Dupe Circle predates the fall of humanity. The original structure served as an underground business area, transportation network, and cluster of secured sub-buildings. During the early pre-fall era, the complex was reinforced to support a cryogenic preservation facility known as the Eagle Mon. The engineering was robust enough to survive the collapse of civilization above it, leaving a vast underground framework waiting to be repurposed.
In the early post-fall era, three groups converged on the tunnels and transformed them. Genjian caretakers, already stewards of the site, maintained what remained. Full Dead who discovered the underground passages claimed space within them. Lascarians joined later and helped expand the network into something habitable. Together, they converted the old cryogenic facility into the heart of a new city. The Dupe Circle became the primary body of The Complex: a six-mile loop connecting every sector of Dominus Columbia through transit, ventilation, and utility routing. It was, for a time, proof that the wastes could not prevent people from building something worth preserving.
That proof collapsed around 125 to 126 DC when the Omni Plague breached into the Dupe Circle. The plague exploited the very feature the builders valued most. Every redundant connection, every branching passage, every ventilation shaft became a vector. The Circle delivered contamination to every sector simultaneously, faster than any quarantine response could contain. The system designed to ensure no one could be left behind ensured that no one was.
In the early post-fall era, three groups converged on the tunnels and transformed them. Genjian caretakers, already stewards of the site, maintained what remained. Full Dead who discovered the underground passages claimed space within them. Lascarians joined later and helped expand the network into something habitable. Together, they converted the old cryogenic facility into the heart of a new city. The Dupe Circle became the primary body of The Complex: a six-mile loop connecting every sector of Dominus Columbia through transit, ventilation, and utility routing. It was, for a time, proof that the wastes could not prevent people from building something worth preserving.
That proof collapsed around 125 to 126 DC when the Omni Plague breached into the Dupe Circle. The plague exploited the very feature the builders valued most. Every redundant connection, every branching passage, every ventilation shaft became a vector. The Circle delivered contamination to every sector simultaneously, faster than any quarantine response could contain. The system designed to ensure no one could be left behind ensured that no one was.
Contaminated six-mile tunnel loop beneath Dominus Columbia
Status
Active Hazard Zone
Pre-Fall Function
Central transit and utility loop
Length
Approximately six miles
Current Threat
Continuous Omni Plague circulation
Alternative Names
The Circle, The Complex's circulatory system
