The #1 player-run guide for Roblox's ultimate underwater survival horror. Master every entity, optimize your modifiers, and conquer the Hadal Blacksite.
Hostile Entities
Game Modifiers
Rooms to Survive
Half A Slice of Cake Update
All Hostile Threats
Complete profiles for every entity — Anglers, Pandemonium, Wall Dwellers, and more. Telegraph signals, evasion strategies, and safespot guides.
Light Sources, Consumables, Tools
Battery burn rates, healing math, Code Breachers, and the ultimate item tier list. Know what to buy from Sebastian's Shop.
50+ Difficulty Modifiers
Every modifier with percentage weights, synergy warnings, and Magnum Opus optimization paths. From Rat Race to Pure Pandemonium.
Procedural Generation Guide
8 room archetypes from the Blacksite to the Flesh Rooms. Locker density, threat levels, and rare room probabilities.
Optimization Strategies
Resource triage, Ridge survival, Code Breacher hoarding, and Endless Mode attrition management. Tips for sub-50-minute runs.
Free Kroner & Revives
All active and expired codes for Pressure. Get free Kroner, Revive Tokens, and learn which codes are traps.
Stop dying to preventable mistakes. These data-driven tools turn the Blacksite's mechanics into clean, actionable numbers — so you can survive smarter, not harder.
Select the entity approaching you, your current situation, and available resources — get the mathematically optimal evasion strategy instantly.
Practice the brutal 40-second cursor-tracking locker minigame right in your browser. Master the technique before Z-367 catches you in-game.
Select modifiers, see cumulative percentage, and check Parvum/Bonum/Magnum Opus qualification. Dangerous synergy warnings included.
Calculate critical injury thresholds, lethality buffer, regen timing, and whether it's safe to use Spr-INT at your current HP level.
Descend into the procedurally generated underwater facility as an Expendable — a prisoner seeking a pardon.
Progress through 100 numbered rooms filled with environmental hazards, locked doors, and keycards.
Hide in lockers, break line of sight, and exploit entity pathfinding when Anglers, Pandemonium, or Wall Dwellers attack.
Light sources drain fast. Buy wisely from Sebastian's Shop. Hoard Code Breachers for The Ridge.
Grab the crystal, survive The Ridge, and sprint to the final airlock. Or go Endless and see how far you can push.
Omnidirectional raycasting, exponential speed when aggro'd, and a 40-second minigame if caught in a locker. The most feared entity in the game.
Infinite locker minigame — guaranteed death if caught. Red lights, slamming lockers, and a quiet tonal hum signal its arrival.
Exponentially faster than a standard Angler. Only 6-9 seconds to hide after the double light flicker. No second chances.
Massive aerial boss with sweeping death beams. Repair generators while dodging — one intersection means instant death by grappling hook.
| Update | Date | Key Additions |
|---|---|---|
| Half A Slice Of Cake | March 28, 2026 | 50+ Modifiers, 180+ Item Skins, 250+ Charms, Insidæ (A-200), Bleach, No Hand, NeoStyk, YouTube integration, Magnum Opus badge |
| Worth the Wait (Pt 1 & 2) | Late 2025 – Early 2026 | Lobby UI overhaul, submarine hosting, cross-server quickplay, modifier system foundation |
| Operation Heartburn | September 12, 2025 | Heartburn campaign, 8 Revenant variants, Submarine Bay overhaul, Takeover achievements |
| The Raveyard | Early 2026 | Raveyard zone, Bouncers, Skelepede, DJ Skeletunes, Gravelight tool, custom acoustic tracks |