6. Gates Of Hell
- Template
- Campaign Chapter
- Status
- Canon
- Number
- 6
- Location
- D3 — Biomedical Research Complex and Fusion Energy Facility
- Period
- 2021
1. Overview
- Location: D3 — Biomedical Research Complex and Fusion Energy Facility
- Year: 2021
- Playable Character: Edmund Sinclair von Veylor-Schloss
- Primary Objective: Restore the experimental fusion reactor and gain access to D4
- Chapter Themes: Biological horror, human experimentation, scientific ambition, guilt, suffering, and the moral consequences of technological progress.
Gates of Hell marks the moment when Project Schwarzwald transitions decisively from military infiltration and industrial exploration into survival horror.
The first two underground levels introduced Edmund to the enormous industrial infrastructure beneath the Amazon rainforest. D3 reveals something considerably more disturbing.
The level's biomedical research past is described with the place. See: Places › D3
The catastrophe of 1999 forced the evacuation of the installation and the shutdown of its experimental fusion reactor.
For twenty-two years, most of D3 has remained without conventional operational lighting.
The fusion reactor itself has been preserved by sophisticated artificial intelligence and automated maintenance systems powered by the facility's separate experimental battery infrastructure.
Edmund's objective is to restore the reactor, thereby returning operational power to the underground installation and reactivating the elevators necessary to reach D4.
However, the reactor's restart procedure is extremely demanding. An incorrect critical operation may permanently destroy its ability to generate power.
Throughout the chapter, Edmund encounters the first biological monsters of the game, discovers evidence of atrocities committed inside the facility, and begins to uncover the first indications that certain scientific breakthroughs were made possible through reverse engineering of a mysterious Artifact.
The origin and nature of the Artifact remain undisclosed.
1.1 The Biological Creatures of D3
Roach Rats, Cancer Dogs and Flesh Nests are the first creatures of the campaign. They must behave as organisms inhabiting an environment rather than conventional videogame enemies whose only purpose is to attack the player.
See: Enemies › Roach Rat
See: Enemies › Cancer Dog
See: Enemies › Flesh Nest
1.2 Combat, Injury, and Survival Philosophy
Combat, injury and survival in D3 follow the game's injury rules.
1.3 Pacifist Gameplay
The campaign remains compatible with completing the game without killing or injuring another living being, for the achievement The Enlightened One, and D3's behavioral systems support this; its nonlethal options are listed with the system.
1.4 Confirmed Chapter Elements
Primary Location: D3 — Biomedical Research Complex.
Primary Objective: Restore the experimental fusion reactor and reach D4.
Confirmed Creatures: Roach Rats, Cancer Dogs, and Flesh Nests.
Major Horror Sequence: The abandoned kennel hallucination, in which Edmund briefly perceives living, distressed dogs before seeing their skeletal remains.
First Monster Encounter: The crying Cancer Dog.
Historical Horror: Surgical recordings, evidence of human experimentation, and Hatzinger's private research records.
Major Lore Revelation: The fusion reactor became possible through engineering insights derived from an unidentified Artifact capable of manipulating spacetime geometry.
Confirmed Side Quests:
- The Unsent Letter — Recover Dr. Valério's documents and automobile keys; optionally deliver his confession to his family.
- The Forgotten Pharmacy — Recover scarce medical supplies.
- The Last Veterinary Ward — Recover an acoustic device capable of influencing the behavior of certain creatures.
Reactor Outcome: Successful activation restores most facility lighting and operational systems. The core remains unstabilized, so the power cycles dynamically between three unstable states until it is stabilized. Critical failure permanently destroys the possibility of nuclear power restoration.
Persistent Consequences: Reactor failure cannot be undone by loading an earlier save.
Next Destination: D4.
1.5 Chapter Identity
Gates of Hell is not intended to be a conventional combat-oriented horror level.
It is an experience built around darkness, biological suffering, scientific ambition, and the discovery of human atrocities.
The monsters are frightening not merely because they can kill Edmund, but because they are themselves the consequences of experiments that should never have been performed.
The scientific achievements are extraordinary, yet they exist alongside evidence of profound moral failure.
The player is not required to reach a single predetermined moral conclusion about every character or event.
Instead, the chapter presents a world in which intelligence, ambition, cowardice, cruelty, suffering, and remorse coexist.
The player descends into darkness seeking a way forward, but what he discovers is the history of a place where extraordinary knowledge developed alongside extraordinary human suffering.
2. Opening
Edmund descends from D2 into D3.
The elevator doors open onto a vast, unlit corridor.
Unlike the previous levels, where sections of the industrial infrastructure remained illuminated, D3 is almost completely dark.
The atmosphere is oppressive.
Edmund hears distant metallic impacts, irregular movements inside ventilation ducts, dripping water, and unfamiliar organic sounds.
Occasionally, something emits a faint whimper from somewhere beyond the reach of his flashlight.
The player cannot immediately identify the source.
D3 must establish its atmosphere gradually. The initial exploration should not immediately expose the player to combat. The darkness, environmental sounds, and uncertainty are allowed to develop naturally.
Edmund can discover abandoned offices, laboratories, medical stations, corridors, and maintenance chambers.
Some doors remain functional through battery-powered security systems, while others must be opened manually or through environmental interactions.
The facility gives the impression that an extraordinary scientific operation was interrupted decades ago and never resumed.
Yet something is still alive.
2.1 Environmental Principles
- The darkness is persistent until the fusion reactor is successfully restarted.
- Edmund must depend on his flashlight and other available light sources.
- Sounds travel through corridors, ducts, and adjacent rooms.
- Creatures continue their activities independently of the player's presence.
- Not every sound represents an immediate threat.
- The environment is designed to encourage observation rather than continuous combat.
The primary emotion during the opening section is uncertainty.
The player knows that something is wrong but does not yet understand its nature.
3. Main Quest
…
3.1 The Fusion Energy Facility
Edmund reaches the fusion energy complex through D3; its location and access are described with the place.
See: Artifacts and Technology › Fusion Reactor
See: Places › D3
The reactor has remained offline since 1999, preserved by automated maintenance intelligence and specialized machinery running on the separate experimental battery system.
3.1.1 The Research Diary
Near the reactor's primary control panel, Edmund finds a scientific research diary celebrating the reactor's first stable fusion cycle. It is the player's first substantial indication that Schwarzwald's technological achievements depend on knowledge obtained through reverse engineering of something extraordinary.
3.1.2 The Abandonment of 1999
Additional records describe the researchers' devastation at the order to shut down the reactor and leave decades of work behind, reinforcing the scale of the 1999 catastrophe.
See: In-World Documents
3.2 The Blocked Maintenance Route
The player discovers that operational elevators are necessary to reach D4.
Edmund may investigate a conventional maintenance route as an alternative.
This route initially appears promising.
Eventually, however, Edmund reaches an area destroyed by a major structural collapse.
The obstruction is too extensive to clear with the resources available to him.
The route is genuinely impassable.
The blocked passage reinforces the importance of restoring the reactor.
The elevators' dependence on the fusion system and the collapsed passage are described with the place.
See: Places › D3
3.3 Restoring the Fusion Reactor
The central objective of Gates of Hell is the restoration of the experimental fusion reactor.
The reactor was deliberately shut down during the 1999 evacuation and subsequently maintained in a preserved state by automated systems.
Friedrich's notes explain the reactor's general purpose, its shutdown, and the existence of the automated preservation infrastructure.
However, reactivation requires Edmund to complete a demanding sequence of safety verifications and restoration tasks.
3.3.1 Eight-Stage Restoration Structure
The main mission should contain approximately eight meaningful stages.
The exact technical puzzles and their implementation remain open for detailed design, but the intended structure includes:
- Access Authorization: Gain entry to the restricted fusion facility and establish legitimate control-room access.
- Preservation Diagnostics: Review the automated maintenance records and determine the present condition of the reactor.
- Structural Verification: Investigate the accessible reactor infrastructure for evidence of damage that would prevent safe restoration.
- Cooling System Assessment: Confirm that the reactor's necessary thermal-management infrastructure is operational.
- Containment Verification: Evaluate the fictional gravitational focusing and laser containment systems through the automated diagnostic interface.
- Power and Control Restoration: Restore the supporting electrical infrastructure required for the reactor's automated startup systems.
- Final Safety Interlocks: Resolve the remaining security and control-system requirements before the reactor can authorize activation.
- Reactor Activation: Initiate the final automated startup and confirm that the facility can sustain electrical generation.
These stages are gameplay-level design categories, not operational instructions for a real nuclear facility. The details of each stage are still undecided.
The objective is to create a substantial, tense engineering mission that requires exploration, careful observation, and comprehension of the installation's documentation.
Edmund does not personally perform the technical work of an entire team of nuclear engineers.
He restores and validates the infrastructure necessary for the reactor's specialized artificial intelligence to conduct the automated activation.
4. Side Quests
…
4.1 The Unsent Letter
- Location: Medical offices, private research areas, and Hatzinger's office
- Primary Reward: A functional automobile located in a surface garage
- Additional Reward: Achievement for delivering the letter to the doctor's family
This optional quest concerns Dr. Valério, a Brazilian physician who worked under Hatzinger.
Edmund may find the physician's final letter, which confesses how his admiration for Hatzinger turned into horror at the human experiments, how fear, professional ambition and submission to authority kept him participating, and his profound remorse; it recalls historical moments when individuals close to powerful perpetrators might have acted to stop them, and concludes that he will not commit the same mistake.
4.1.1 The Murder Recording
Elsewhere in the installation, Edmund may discover a damaged security recording whose surviving audio captures the physician attacking Hatzinger with a knife inside his office.
4.1.2 The Newspaper
Edmund may find a newspaper report of Hatzinger's death, which notes that his body was not displayed during the funeral. This detail acquires a second meaning after the player discovers the security recording, and establishes that the true circumstances of his death were concealed.
4.1.3 The Physician's Death
Further evidence establishes that the Brazilian physician subsequently died by poisoning.
What his letter foresees about his death and asks of its finder is given with the document.
See: In-World Documents › Dr. Valério's Unsent Letter
How his death and his responsibility are portrayed is described with the character.
4.1.4 The Automobile Reward
The physician's letter includes a reference to a personal automobile; what he writes about it is given with the document.
See: In-World Documents › Dr. Valério's Unsent Letter
The car keys are stored in a private safe.
The letter supplies the combination.
If Edmund opens the safe, he can recover the keys.
The vehicle is parked in an old garage near the surface installation.
It appears neglected but remains mechanically usable, with any necessary explanation for its preservation integrated into the environment.
This reward is particularly valuable if Edmund has lost access to the truck or other transportation.
4.1.5 Quest Completion
If Edmund collects the letter, he may choose to have it delivered to the physician's family once he is back at the mansion at the end of the game.
Doing so completes the secondary objective and unlocks an achievement.
The automobile remains the functional gameplay reward, independent of Steam or any external achievement system.
The letter can be ignored entirely.
4.2 The Forgotten Pharmacy
- Location: Abandoned medical storage and pharmaceutical laboratories
- Primary Reward: Scarce medicines and first-aid supplies
Edmund discovers records referring to a restricted pharmaceutical storage facility.
The pharmacy and its surroundings are described with the place.
See: Places › D3
The player must explore the surrounding infrastructure to gain access.
Inside, Edmund finds a limited quantity of preserved medical supplies.
4.2.1 Gameplay Significance
The pharmacy's supplies serve the game's rules for injuries and their treatment.
See: Systems › Injuries And Medical Care
The pharmacy provides useful resources for the remainder of the campaign.
These supplies are finite.
The quest also exposes additional evidence of unethical medical research carried out within the complex.
4.3 The Last Veterinary Ward
- Location: Veterinary research facilities and animal handling areas
- Primary Reward: Portable acoustic animal-deterrent device
This quest is connected to the abandoned veterinary ward and its animal behavior research records.
Edmund discovers that certain researchers developed an acoustic device intended to influence the movement of experimental animals.
A portable version remains somewhere inside the facility.
The player can locate and recover it.
4.3.1 The Acoustic Device
The device, its original use and its effect on the animals are described with the artifact. However, it is not completely reliable.
4.3.2 Gameplay Significance
The device's nonlethal role and its limitations are described with the artifact.
See: Artifacts and Technology › Acoustic Animal Deterrent
The device also integrates with the animals' existing behavioral systems rather than requiring a separate artificial intelligence architecture.
5. Key Narrative Sequences
…
5.1 First Creature Encounter — The Crying Dog
The first major monster encounter in D3 introduces the Cancer Dog.
The first Cancer Dog encounter occurs as part of the main narrative shortly after Edmund reaches the darker areas of D3.
Edmund is exploring a dark corridor when he hears the unmistakable sound of a dog whimpering.
The sound is faint and comes from somewhere ahead.
As he advances, he notices a small silhouette near the end of the corridor: the silhouette of what appears to be an ordinary dog.
From a distance, it appears to be an injured dog.
The animal is barely moving.
It continues crying.
Initially unaware of its condition, Edmund approaches cautiously and attempts to pet it.
He speaks gently to the animal.
Edmund: "Oh, little boy... How can I help you?"
The dog raises its head.
As Edmund moves closer, the flashlight illuminates its body.
The animal is horribly deformed.
Tumors cover its skin. Abnormal structures protrude from its torso. Its limbs and body proportions are deeply unnatural.
Edmund recoils in horror.
Edmund: "What the fuck is this?!"
The wording of this line is only illustrative; what matters is that Edmund is clearly surprised.
The creature continues whimpering.
This first encounter is a cutscene: the frightened animal reacts aggressively and pursues him, and the brief cinematic sequence transitions into a playable escape.
The encounter introduces the player to a fundamental principle of D3: these creatures are not merely monsters waiting for combat triggers.
They are suffering organisms whose responses cannot always be predicted.
How Cancer Dogs behave outside this cutscene is described with the enemy.
See: Enemies › Cancer Dog
5.1.1 Additional Dynamic Horror
Elsewhere in D3, further Cancer Dog sightings are driven by the simulation; they are described with the enemy.
See: Enemies › Cancer Dog
5.2 The Abandoned Veterinary Ward
Edmund reaches D3's abandoned veterinary ward and its kennels, described with the place.
See: Places › D3
5.2.1 The Kennel Hallucination
While exploring the kennel section, Edmund experiences a brief but intense perceptual episode.
As he enters a large kennel chamber, the player begins hearing dogs barking and whimpering.
The sounds grow louder.
Edmund turns toward the cages.
For a moment, the animals are there.
Dogs stand behind the metal bars.
Some bark desperately.
Others whimper, tremble, or press themselves against the doors.
The chamber seems full of frightened animals.
The player can see them moving inside their enclosures.
The sound becomes overwhelming.
Then something changes.
The barking begins to fade.
The movement stops.
The perception breaks.
The animals are gone.
In their place are skeletal remains.
The chamber is silent.
Edmund stands still, attempting to understand what he has just experienced.
Edmund: "What...?"
He looks again.
Nothing moves.
Only the remains are there.
The moment must not be presented as an ordinary jumpscare.
Its purpose is to expose Edmund and the player to an apparent fragment of the suffering that occurred within the facility.
The experience should feel sudden, emotionally overwhelming, and deeply unsettling.
Its precise cause remains unexplained at this point in the story.
The player is not told whether Edmund experienced a hallucination, an unusual neurological response, or another phenomenon associated with the installation.
5.2.2 Narrative Significance
This sequence reinforces a central theme of Gates of Hell: the creatures currently inhabiting D3 are not the only victims of the experiments.
Long before Edmund arrived, countless animals suffered inside these rooms.
The kennel scene forces the player to confront that suffering without relying on explicit physical violence.
The moment also establishes an important contrast between the living Cancer Dogs and the remains of animals that never escaped their enclosures.
5.3 The Surgical Theater
During exploration, Edmund may discover an abandoned human surgical theater, described with the place.
See: Places › D3
A surviving recording can be played. Its footage is given with the document.
See: In-World Documents › The Surgical Recording
Their emotional detachment is more disturbing than overt expressions of sadism.
Edmund watches for a brief period before abruptly stopping the recording.
Edmund: "What the fuck is this?"
He looks at the equipment.
Edmund: "Why would they do that to him? Those people were monsters."
The player is left alone with the silence of the room.
No combat encounter immediately follows.
The sequence is designed to communicate the systematic nature of the atrocities committed inside the installation.
5.4 Historical References and Hatzinger's Legacy
D3 holds Dr. Hatzinger's private office, where a concealed room or restricted section reveals portraits of Shirō Ishii and Josef Mengele and private writings that admire them; the portraits establish his admiration for real historical perpetrators without implying that they took part in the fictional Schwarzwald project. Edmund may react briefly to recognizing the historical figures, while the environment and documents carry most of the narrative weight.
Edmund: "Bastards."
5.5 Environmental Storytelling and Moral Atmosphere
D3 must communicate that the horror of the installation is not limited to its surviving organisms.
Its architecture contains evidence of scientific ambition, institutional secrecy, professional pride, moral corruption, and human suffering.
The player may discover:
- Surgical recordings.
- Medical notes.
- Veterinary research records.
- Personal letters.
- Historical photographs.
- Internal correspondence.
- Research diaries.
- Audio recordings.
- Newspaper clippings.
- Evidence of concealed crimes.
Some documents reveal genuine scientific achievements.
Others expose deliberate cruelty.
The contrast is essential.
The people who worked in the facility, and their varied relationship to its crimes, are described with the faction.
See: Factions › Project Schwarzwald
The Brazilian physician's story illustrates the moral consequences of submission, complicity, fear, and delayed resistance.
The fusion research logs illustrate the tragedy of an extraordinary scientific achievement abandoned before it could benefit humanity.
The abandoned kennels reveal the suffering of animals that were never permitted to escape.
Together, these discoveries establish D3 as more than a collection of monsters and puzzles.
It is a record of lives, ambitions, discoveries, and atrocities.
6. World-State Changes
…
6.1 Permanent Reactor Failure
The reactor restoration mission has an unusually severe consequence system.
Some mistakes may be recoverable.
However, an incorrect operation at a critical stage can irreversibly damage the reactor.
If the reactor is destroyed or rendered permanently unusable, the facility's nuclear fusion generation cannot be restored during that campaign.
This failure persists even if the player attempts to load an earlier save.
The permanence of the failure is a deliberate game-design principle.
The player must treat reactor restoration as a genuinely consequential operation rather than a puzzle that can be repeated indefinitely without risk.
6.1.1 Consequences of Failure
If the reactor is permanently disabled:
- The facility's main operational lighting remains unavailable.
- The deeper elevators dependent on the reactor remain inactive.
- D3 continues to be dominated by darkness.
- Edmund remains dependent on portable illumination.
- The biological creatures retain their original preference for dark environments.
- Exploration becomes more dangerous and resource-intensive.
- Edmund must search for an extraordinary alternative means of reaching D4.
The conventional D3-to-D4 maintenance passage remains blocked by the structural collapse.
The emergency route of the permanent-failure branch is still undecided.
The failure must create severe consequences without leaving the player in an unintentionally impossible campaign state.
6.2 Successful Reactor Activation
If Edmund completes the restoration procedure successfully, the reactor's automated systems begin their activation sequence.
The fusion equipment gradually comes online.
Control panels awaken.
Industrial machinery begins operating.
The reactor's immense chamber fills with the sounds of active equipment.
The reactor artificial intelligence confirms electrical generation, but the core is not stabilized: from this moment the power cycles dynamically between three unstable states, and lighting and equipment fluctuate with it until the reactor is stabilized.
Power begins returning to the facility.
Across the underground installation, computers boot, ventilation systems start, control machinery reactivates, and operational lighting comes back online.
The elevators regain power.
6.2.1 Environmental Transformation
The reactivation produces a lasting change in D3.
Before activation, the level is almost entirely dark.
After activation, most operational lighting systems return to service. Until the core is stabilized, that light fluctuates dynamically with the reactor's three unstable power states.
However, not every area becomes illuminated.
Some lights were physically destroyed during the catastrophe.
Other regions contain broken cables, damaged electrical circuits, or infrastructure that can no longer receive power.
Those areas remain dark despite the functioning reactor.
This creates an uneven environment of illuminated corridors, dark laboratory wings, partially lit industrial spaces, and completely abandoned sections.
6.2.2 Creature Responses to Light
The change in lighting also affects the biological creatures.
The Roach Rats' preference for darkness is described with the enemy.
See: Enemies › Roach Rat
Cancer Dogs also tend to avoid brightly illuminated spaces.
Their behavior is not absolute; how individual animals respond to light is described with the enemy.
See: Enemies › Cancer Dog
The reactor does not eliminate the creatures.
Instead, it changes their distribution and movement patterns.
After activation, dark areas become more likely to contain biological threats, although illuminated spaces are never guaranteed to be safe.
This behavior contrasts with certain human and humanoid enemies encountered in later levels, which do not share the same aversion to light.
6.2.3 Narrative Significance
Restoring the reactor is not simply the completion of an engineering puzzle.
Edmund has reactivated one of the most extraordinary technologies ever developed within Schwarzwald.
For the first time in twenty-two years, a major part of the underground installation returns to operational life.
The achievement is both impressive and unsettling.
The facility is no longer entirely dormant.
7. Chapter Ending
The chapter follows a flexible exploration structure.
Edmund enters D3 and begins investigating the dark biomedical complex.
The player gradually encounters the three established creature types, explores abandoned facilities, and discovers the importance of the experimental fusion reactor.
The three secondary quests can be undertaken independently of the main restoration mission.
Their rewards provide meaningful improvements to mobility, medical survival, and nonlethal animal avoidance.
Eventually, Edmund must confront the reactor's restoration procedure.
Success transforms the lighting and operation of the underground installation, granting access to the elevators leading to D4.
Failure permanently disables the reactor and forces Edmund into an exceptionally difficult alternative progression branch, whose precise route remains to be designed.
The chapter concludes when Edmund secures access to the next underground level.
D4 introduces a fundamentally different kind of horror.
Unlike the mutated animals and organic growths of D3, the next level will introduce the Broken Survivors: human beings who have endured extreme psychological and spiritual devastation while retaining intelligence, memory, language, and elements of their former identities.
The transition should preserve the impression that Edmund is moving progressively deeper into an installation whose scientific achievements and moral failures become increasingly difficult to comprehend.
8. Open Questions
The chapter's outstanding design decisions are listed in Canon.