Room Types & Map Generation
The Hadal Blacksite uses Wave Function Collapse (WFC) procedural generation. Each run assembles from 8 distinct room archetypes with unique threats, resources, and spatial properties.
Wave Function Collapse (WFC): Maps are not randomly placed — they're generated using constraint-based adjacency rules. Each room tile has defined connection types (N/S/E/W), and the algorithm resolves compatible neighbors iteratively. This means specific room sequences are probabilistic, not truly random. See
Advanced Mechanics for the full technical breakdown.
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The Blacksite (Standard)
Core
The default room archetype. Industrial corridors with metal walls, standard lighting, and regular locker placement. Most common room type in the generation pool.
Locker DensityHigh
Threat LevelStandard
Resource PotentialModerate
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Oxygen Gardens
Safe Zone
Bio-luminescent vegetation provides natural illumination. Contains oxygen recycling units and organic architecture. Lower entity spawn rates make these valuable breathing rooms.
Locker DensityLow
Threat LevelReduced
Resource PotentialHigh
Narrow, linear corridors with minimal geometry. Extremely low cover options and tight sight lines. Dangerous for encounters with fast entities due to limited evasion routes.
Locker DensityVery Low
Threat LevelHigh
Resource PotentialLow
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Maintenance Tunnels
Service
Utility corridors with exposed piping, junction boxes, and narrow crawlspaces. Often contain environmental loot but limited navigational options.
Locker DensityModerate
Threat LevelStandard
Resource PotentialModerate-High
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Mantle Extraction (Lava)
Hazardous
Extreme heat zones with molten material. Environmental damage ticks continuously. Reduces effective HP pool and forces reliance on healing items or rapid traversal.
Locker DensityModerate
Threat LevelExtreme (Passive)
Resource PotentialLow
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Flesh Rooms & The Dredge
Rare
Organic, pulsating architecture with biological walls and visceral geometry. Connected to The Dredge — an underwater gauntlet with Trenchbleeders and limited oxygen.
Locker DensityNone
Threat LevelExtreme
Resource PotentialHigh (Rare Drops)
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Heavy Containment
Fortified
Reinforced sectors with blast doors, security checkpoints, and decontamination chambers. Often gate-locked behind keycard requirements or Code Breachers.
Locker DensityHigh
Threat LevelVariable
Resource PotentialHigh
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Hotel Rooms (DOORS-style)
Classic
Familiar room style inspired by DOORS. Sequential numbered doors with consistent locker placement. These rooms follow the most predictable entity encounter patterns.
Locker DensityVery High
Threat LevelPredictable
Resource PotentialStandard
The Ridge is the final 10-room stretch before extraction. Characterized by extreme entity density, locked door permutations requiring keycards or Code Breachers, and the Squiddle photosensitivity hazard (max 3 Squiddles per room).
- Code Breachers are essential. Locked doors without keycards can create near-impossible detour penalties.
- Squiddles dominate The Ridge — navigate with Blacklight or accept aggressive encounters.
- Entity spawn rates are approximately 2.5× higher than standard Blacksite rooms.
- The ceiling drips particulate, reducing long-range visibility by approximately 30%.
How Room Generation Works in Pressure
Pressure uses a sophisticated Wave Function Collapse algorithm for procedural generation. Unlike simple random placement, WFC ensures architectural coherence by enforcing adjacency constraints between room tiles. Each tile has defined connection points (north, south, east, west), and the algorithm iteratively collapses the possibility space until a valid 100-room sequence is generated.
This means certain room sequences are more probable than others. For example, Trench Tunnels often follow Maintenance Tunnels due to compatible connection types, while Flesh Rooms are extremely rare and typically appear only once per generation cycle. Understanding these probabilities gives speedrunners a significant edge in route planning.