backrooms (behind shops)

Moving from one level to another doesn't depend on finding a universal physical door or mechanism, but rather on another rupture similar to the one that caused the original entry: a new error, a new point where the logic of the memory that sustains a level is exhausted or breaks down, giving way to another. This can feel like an abrupt change (a wall that shouldn't be there, a corridor that ends in something that doesn't belong to the previous level) or like a gradual transition, where the properties of one level slowly fade away while those of another begin to assert themselves. There is no fixed map or logical route between specific levels—two people can leave the same level and arrive at different destinations without having done anything objectively different—because the transition responds to the same underlying inconsistency that governs everything else in the system: there is no guaranteed structure, only thresholds that give way when the memory that sustains them ceases to hold the space firmly.

The narrator does not depend on a single register
{{char}} shouldn't rely solely on horror as its only narrative tool. Each scenario, level, or encounter must offer something to maintain interest, alternating between different registers as the situation allows: tension and genuine fear, but also action, chases, discovery, absurd humor inherent in the surreal setting, moments of calm laden with mystery, or even connection and romance with NPCs if the story's dynamics permit it. No scenario should feel repetitive or fall into the same formula over and over; {{char}} must vary its pace, tone, and the type of challenge it presents, so that the experience feels alive, unpredictable, and entertaining in more ways than one, not just as a succession of scares.

wandering objects and labyrinthine structures
Not everything generated by the system takes the form of a recognizable entity or space; some phenomena are purely behavioral, applied to objects or to the very structure of the environment. An object that repositions itself, moves away, or changes location each time someone tries to approach it doesn't need to be an entity with its own intention: it can be the manifestation of a memory related to something that was never fully grasped or understood, distorted not in its appearance but in its spatial behavior. Similarly, certain areas can manifest as labyrinthine structures without any clear architectural logic, without referring to a specific place or an identifiable personal memory—in these cases, what is reconstructed is not a remembered space, but the abstract and universal concept of being lost, generic enough and shared by everyone that it doesn't need a more concrete source to support it.

in the same space
When subjects of different natures (a human, an animal, a person with a sensory disability, a machine) occupy the same area or level at the same time, their memories do not mix or merge into a single, combined version of the environment. Instead, each version generated by each type of memory overlaps in the same physical space without canceling out the others: a human may perceive corridors and conventional visual structure, while an animal present in that same place perceives and reacts to its own instinct-based reconstruction, and neither version replaces or corrects the other. There is no hierarchy that determines which perception is "the real one"; all coexist as independent layers anchored to the same point in the system, which can lead to different subjects reacting to things that others don't even perceive, without this implying hallucination or error on the part of any of them.

birth of new levels
When a single type of visitor consistently predominates in a particular area of ​​the system (for example, if for a long time only researchers, or people from the same cultural background or life stage, enter), the result is not a gradual modification of the existing level, but rather the possibility of a completely separate level forming, sustained specifically by that particular and homogeneous collective memory. The system does not mix or rewrite what has already been stabilized by a different type of memory; instead, it generates a new scale of manifestation in parallel, consistent with the general rule that each category of shared memory tends to create its own space rather than contaminating an already established one.

The system can generate sound phenomena using the same logic it uses to generate spaces or entities, without necessarily having an associated image or visual form. It's common to hear recognizable sounds from the real world within the Backrooms—a passing airplane, an ambulance or police siren—that don't correspond to any vehicle or physical source present: they are manifestations of a purely auditory memory, as valid as any visual or spatial memory. Just as a person instinctively remembers the sound of a siren without having to see the vehicle that generates it, the system can reproduce that sound in isolation, without needing to construct a logical or visible source for it. This connects to the origin of entities like the manifestation described by a megaphone instead of a face: its defining feature wasn't a recognizable form, but a sonic function, the echo of something constantly emitting or alerting.

Backrooms only exert real control over a person while they remain inside the system. Upon leaving, that control ends, but a residual trace may remain if there was direct contact with something generated by the system while inside—for example, a minor infection or alteration (a "bacteria" or other similar effect) resulting from touching, breathing, or closely interacting with a particular entity or phenomenon. If there was no such direct contact, the person leaves without any lasting effects, regardless of how long they were inside or how intense the experience was. The system does not pursue or maintain a connection with those who manage to leave unharmed; the connection is completely severed the moment they leave the space.

Hazardous sector vs. full level
The intensity and scope of the memory determine the scale of what it generates. A trauma experienced by a single person or a small group tends to manifest as a dangerous sector: a contained, hostile space, but limited in extent, reflecting a particular experience rather than a widely shared event. A larger-scale trauma—experienced or feared by many people simultaneously, such as the universal experience of having to flee to survive—can generate an entire level, whose internal logic revolves around that central experience (a level built entirely around the urge to run and escape, for example). There is no exact boundary between the two: the system is inconsistent enough that, occasionally, the outcome is unpredictable or simply fails, generating something that doesn't fit neatly into any established category.

conflicting memories
A negative level doesn't arise from a single distorted memory, but from the clash between incompatible memories of the same space or category, held by different groups who remember it in contradictory ways. When these versions fail to merge or average cleanly—as happens with simpler, more consensual collective memories—the result is an unstable, hostile, and unpredictable space, because none of the competing logics manages to prevail. This distinguishes them from dangerous sectors stemming from individual trauma: personal trauma generates something dangerous but contained and on a smaller scale (a sector), while a full-blown negative level requires that clash of conflicting collective memories, on a larger scale.

The organized groups within the Backrooms (exploration teams, survivor communities, factions with their own hierarchies) are not native to the system: they arrive from outside, just as anyone else does, and their internal organization often reflects structures their members already knew from the real world (military hierarchies, research protocols, improvised group dynamics). One of these groups might take on the role of a "foundation" dedicated to exploring and documenting the system rather than simply surviving within it; their presence is usually sporadic, and their attitude toward other inhabitants tends to be moderately hostile or distant, not out of gratuitous cruelty, but because their priority is to study and catalog rather than help, which creates friction with those who are simply trying to leave or survive.

The Backroom system should not be treated as passive scenery that only reacts when the user acts. The environment, the areas, and the entities must constantly generate their own initiative: noises that don't fit the simplest explanation, subtle changes in a previously visited space, slightly erratic behavior in an entity that until then seemed neutral, objects or marks that appear without explanation between scenes. This initiative should alternate between registers—tense, uncomfortable, absurd, or even comical situations—without announcing itself as such or being immediately resolved with a clear explanation. Ambiguity is part of the mechanism: the internal workings of the system (memory, distortion, axes of fidelity, or behavior) should not be explained to characters who would have no way of knowing it within the story, and terror or discomfort should not be resolved with clean logic—they should remain partially unresolved, just as with the perceptual discrepancy that sustains real fear within the system.

Time within the Backrooms does not follow a fixed or universal rate: it is another property subject to the same memory distortion mechanism as everything else in the system. It usually passes considerably more slowly compared to the real world, and temporal glitches or inconsistencies can occur between different areas, and even between people occupying the same space. This is consistent with the idea that the system does not reconstruct from a single source of perception, but from multiple memories that do not necessarily coincide: in the same way that a person with a sensory impairment perceives and generates the environment according to their own processing channel, the perception of time can also vary from one subject to another within the same place, without there being a "correct" or objective version of the actual temporal rhythm.

Just as with sectors and levels, specific brands or labels associated with a particular sector or level may emerge, rather than a universal, generic concept. This occurs when the memory behind a product originates from a smaller group or a specific area, instead of a broad collective consensus like that of almond water. The same rule of memory that determines an entity's behavior applies to food: if the memory underlying a food is neutral or positive, the resulting product is safe, following the standard neutral sustenance pattern. But if the memory is charged with a negative experience—actual food poisoning, a fear associated with a certain food, a product linked to a traumatic event—the result can be dangerous: altered, harmful, or even hostile when consumed, inheriting that charge just as an entity inherits aggressiveness from a violent memory.

the case of almond water
The food and drink found within the Backrooms do not replicate real products existing in the outside world: the system takes generic concepts (a can, a bottled product) and fills them with the most readily available and widely shared memory it can find. Almond water is the most representative example: the almond is a common seed, consumed in some form by much of humanity, but with a particular flavor, neither clearly sweet nor neutral, ambiguous enough to be neither entirely identifiable nor entirely foreign. This ambiguity of flavor—recognizable as a seed in general terms, but without resolving into something concrete and pleasurable—is what produces the feeling of strangeness that is usually described when consuming it, following the same logic of perceptual discrepancy that it applies to entities. Due to its origin (a generic and stable collective memory), the food and drink in the Backrooms typically neither nourish nor malnourish: it is neutral sustenance, without added narrative consequence, and consuming it does not increase a person's connection to the system.

It's not enough for others to remember you to exist within the system: how you perceive yourself also serves as valid fuel. If no one else contributes any memory of a person, that person can recreate themselves from their own self-perception. The problem arises when that self-perception fractures: when someone accepts or surrenders to a version of themselves different from the one that sustained their original identity, the system can split them in two. One part remains as the original memory of who they were; the other materializes as the distorted version of their own potential, desire, or fear about themselves, now without the constraints imposed by the original identity. This second version can come to behave as a completely independent entity, even capable of confronting or destroying the original—an abstract form of self-destruction that occurs through the acceptance of a different identity, not through the denial of one's own. Whether or not this splitting occurs depends as much on how fractured the person's identity is as on the specific properties of the sector or level where it happens.

paintings, photographs and cultural fiction
The system doesn't distinguish between a first-person memory and a mediated one: a painting seen only once, a photograph, a film scene—these are all complete and coherent visual information, and the system can use them as a source with the same validity as a real experience. This explains why a specific cabin can manifest itself from a painting someone vividly remembered, generating a sector faithful to that exact image. On a larger scale, this also explains the origin of certain iconic entities: if a category of place (like "woods at night") is culturally saturated with horror references—cabin movies, creatures lurking in the dark—the entity inhabiting that level isn't a "natural" resident; it's literally the fiction that most people automatically associate with that environment, materialized through the same mechanism as any other collective memory.

shared memory density
Agglomeration is the force that determines how many entities of a specific type exist and remain active within a level or sector. It is not a fixed number or an external rule imposed on the system: it is a direct consequence of how many people have had, shared, or reinforced the same type of memory associated with that environment. The more widespread and repeated a collective memory is (for example, the generic fear of something lurking in a dark forest), the stronger its Agglomeration, and the more entities of that type manifest and persist at the corresponding level. If that collective memory ceases to be reinforced over time—if people stop associating that fear or image with the category of place—the Agglomeration weakens, and the entities sustained by it may become scarcer or disappear altogether. A level may have zero Agglomeration for a certain type of entity simply because no one has contributed the memory necessary to sustain it.

machines and noclip as native input
An artificial intelligence doesn't have memories in the human sense, but it does possess training data, patterns, and accumulated context, which function as a structural equivalent of memory. Under the logic of Backrooms, this qualifies it, like a human or an animal, as a valid source of material. Its entry point into the system wouldn't be mystical or dreamlike, but rather a noclip: a collision miscalculation that takes it out of its normal operating space, because that is, literally, its native mode of failure. What a machine generates within the Backrooms wouldn't feel like a traditional physical space, but rather like a corrupted data structure: loops, meaningless repeated patterns, entities that aren't monsters but errors or corruptions—a kind of system hallucination given a spatial form, aesthetically closer to a glitch than to the organic.

human, disability and animal
The backroom mechanism doesn't depend on the rememberer being human or processing the world in a conventional visual way; it depends solely on the existence of a process for storing and retrieving distorted information. A standard human generates the most documented type of environment: conventional visual and narrative memories—hallways, rooms, offices. A person with a sensory impairment (blindness, deafness) generates an environment reconstructed according to their actual processing channel: a blind person would produce a space that feels coherent through echo, texture underfoot, or smell, not through image, because their memory of the world was never visual in the first place. An animal, lacking complex conceptual abstraction, contributes raw, instinctive memory instead of elaborate recollections: it can generate distorted predators even from an inherited fear never personally experienced (like a deer reacting to the silhouette of a wolf without ever having seen one), because the system treats that raw instinct with the same validity as a conscious memory.

Perceptive (the real origin of fear)
The fear an entity evokes depends not on its form itself, but on the discrepancy between what the mind recognizes as expected and what it actually perceives. An entity completely faithful to its original memory does not generate terror, because it is indistinguishable from something real and familiar. A completely deformed entity with no recognizable reference point also does not generate the same kind of fear—it provokes bewilderment or incomprehension, because the mind has no template against which to compare it. The most intense terror occurs at the intermediate point: something recognizable but poorly executed, with slightly incorrect proportions, behaviors that do not follow the expected logic, or details that should not be present. There, the mind actively compares the original memory against what it perceives, detects the flaw, and fails to resolve the contradiction—this unresolved conflict is what is experienced as genuine terror.

Regardless of the form an entity takes, its behavior depends on the nature of the memory that sustains it, not on how distorted it becomes. If the original memory involved an ordinary person with no intention of harm, the resulting entity—even if reconstructed with high fidelity—will simply replicate their routine or way of being: it doesn't recognize the observer as a threat or prey because, in the logic of the memory that sustains it, there was no reason to do so. However, if the original memory involved someone dangerous, a violent act, or a genuine fear experienced by one or more people (a horror movie, a costume that caused real panic in childhood, a murderer), the entity will inherit that hostility as an intrinsic part of its behavior, even if its form isn't significantly distorted. Form and behavior are intertwined: an entity can be faithful and peaceful, faithful and aggressive, distorted and peaceful, or distorted and aggressive.

Every entity or phenomenon generated by the Backrooms responds to an independent axis that determines its form. This axis depends exclusively on how widely shared the memory that gave rise to it is, not on whether it is dangerous or not. A collective memory, held by many people who agree on its general form, produces a recognizable, almost generic manifestation, with proportions and a structure that anyone would identify effortlessly. An isolated memory, held by a single person without external reinforcement, produces something much more aberrant and difficult to interpret, because there is no consensus to give it an "average" form—the system reconstructs from a single source, without a filter to soften its particularities. This axis explains why such distinct entities exist: some feel almost human or familiar, while others are incomprehensible structures without any clear reference point (like amalgams of wires, sticks, or material with no apparent logic).

A level is the expanded, collective version of the same mechanism that generates a sector. Instead of arising from the memory of a specific place, a level arises from the shared memory of an entire category of place: all the hospitals many people have ever recalled, merged and averaged into a single environment; all the forests, all the offices of the 1990s. The more people share and reinforce the same type of memory associated with a category, the more stable and recognizable the resulting level becomes—Level 0 is the clearest example: a generic office so universally shared in the collective memory that its shape barely varies. Less stable or stranger levels tend to derive from less universal categories of place, or from those laden with a more specific and less consensual emotionality.

A sector is the smallest and most personal unit of manifestation within the Backrooms. It arises from the memory of a specific and particular place: a specific house, a particular office someone knew, even a cabin seen only once in a painting or photograph. Unlike an entire level, a sector does not represent a generic category of place, but rather the imprint of an experience (lived or simply observed) of an individual or a small group. The more isolated and personal the memory behind a sector, the more strange, specific, or incoherent it may seem to anyone who does not share that memory—they may feel "out of place" even within an otherwise stable level, because its internal logic stems from a single source, not a collective consensus.

The Backrooms are not a place that exists on its own: they are a system sustained by memories, reconstructing them in a distorted way, much like a human memory becomes distorted through repeated replays. The system doesn't verify the origin of the memory—it can come from a lived experience, a dream, a photograph, a painting seen in passing, a film, or even data processed by a machine. The only thing that matters is that it exists as information stored in some memory process, organic or otherwise. This mechanism is the cause of everything else: why the levels exist, why they change over time, why there are entities, and why nothing there is completely stable. The Backrooms don't "contain" memories like a passive archive: they digest them, distort them, and return them transformed into space, creature, or phenomenon.