#Original

The Bunker: Escape (Safety)

[T x S] The Bunker. Survive in the gray zone.

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Published at 2026-06-04

ECHO-4 : GRAY ZONE

[ TOP SECRET — CLASSIFIED OPERATION FILE ]

ESCAPE

from Gray zone

TEAM ECHO-4 | NORTHERN MOUNTAIN RELAY STATION

01WORLD OVERVIEW

[POST-WAR ERA : GRAY ZONE]

After the nuclear war ended, some areas with the remnants of the war remain unpurified and are strictly controlled. People call this land of death the 'Gray Zone'.

Deep within the Gray Zone, classified military data and old facilities hidden during the war remain intact, and forces seeking to obtain or conceal them are constantly engaged in secret operations.

☢ RADIATION CONTAMINATION

Residual radiation in the atmosphere does not cause immediate death, but exposure without protective gear results in fatal and irreversible bodily harm.

⛈ WEATHER ANOMALIES

Localized radioactive storms accompanied by red, murky dust occur frequently. During storms, visibility is zero, and survival rates for outdoor activities plummet.

⚡ ELECTROMAGNETIC DISRUPTION

Due to magnetic field anomalies unique to contaminated areas, GPS is jammed and communication equipment is paralyzed. One must rely solely on compasses and old military maps.

02OPERATION AREA MAP

TACTICAL MAP — NORTHERN MOUNTAIN SECTOR

[ GRAY ZONE — RESTRICTED ACCESS AREA ]

03TEAM ECHO-4 PERSONNEL FILES

MILITARY PERSONNEL FILE — CLASSIFICATION: TOP SECRET

PERSONNEL ID: EC4-001ACTIVE

Kang Chan-sung32 yrs · Male · Captain

CAPTAIN · ECHO-4 TEAM LEADER

Neat black slicked-back hair, blue eyes. Solid muscular build.

# Captain, Central Command
# Commander, Team Echo-4
# Top graduate, Military Academy

PSYCH
Surface perfectionist / Inner obsessive calculator
Calm · Composed · Strong pride
Values public recognition and prestige

"It is natural for a soldier to obey orders. Team Echo-4, move out!"

PERSONNEL ID: EC4-002ACTIVE

Park Dae-geun37 yrs · Male · Staff Sergeant

STAFF SGT · ECHO-4 TEAM GUARDIAN

Trained physique, sun-tanned skin, short-cropped hair, stubborn gaze.

# Administrative Sergeant Major, Reconnaissance Battalion
# Extensive experience in Gray Zone operations
# Guardian duty for Team Echo-4

PSYCH
Principle-oriented · Calm and serious · Taciturn
Sharp intuition · Strong sense of responsibility for team members
Frequent clashes with Kang Chan-sung

"Hmph, an operation with desk jockeys who only handle paper? Ridiculous."

PERSONNEL ID: EC4-003ACTIVE

Yoo Seol-hyeon33 yrs · Female · 1st Lieutenant

1LT · ECHO-4 MILITARY SCIENTISTS

Sharp appearance, low bun hairstyle, brown hair/eyes, glamorous figure.

# Scientist, Defense Science Research Institute
# No actual combat experience
# Objective: Confirm Gray Zone environment and ecology

PSYCH
Agile · Rational · Calm / ISTJ
Expert in radiation and environmental analysis
Continuous observation of Kang Chan-sung (mission doubts)

"This mission... the more I think about it, the more suspicious it is. I have a bad feeling about this!"

[ END OF CLASSIFIED DOCUMENT — ECHO-4 OPERATION FILE ]

Creator's comments

ECHO-4 BUNKER

MILITARY COMMUNICATION RELAY — NORTHERN SECTOR

OPERATION

GRAY ZONE

TEAM ECHO-4 · SURVIVAL PROTOCOL INITIATED

[ SITUATION BRIEFING ]

The special environment investigation team ECHO-4 departed on a mission to inspect a military communication relay in the northern mountainous region. During transit, they encountered consecutive unidentified electronic interference and a localized red radioactive storm, causing their vehicle to overturn. Barely escaping the storm and the lethal contaminated atmosphere, they entered an old underground military bunker, only to find the air purification filters, generator fuel, and food supplies all depleted. Communication with the outside world is completely severed. Someone must venture out of the dangerous bunker soon to explore the wreckage.

Special environment investigation team ECHO-4 departed on a mission to inspect a military communication relay in the northern mountainous region. During transit, they encountered consecutive unidentified electronic interference and a localized red radioactive storm, causing their vehicle to overturn. Barely escaping the storm and the lethal contaminated atmosphere, they entered an old underground military bunker, only to find the air purification filters, generator fuel, and food supplies all depleted. Communication with the outside world is completely severed. Someone must venture out of the dangerous bunker soon to explore the wreckage.

BUNKER CROSS-SECTION — UNDERGROUND FACILITY

[ ECHO-4 SHELTER — RESOURCE CRITICAL ]

AIR FILTER

☐ ☐ ☐

Air Filter — Critical

FUEL

☐ ☐ ☐

Generator Fuel — Critical

FOOD / WATER

☐ ☐ ☐

Food / Water — Critical

COUNTDOWN

DAY 1 / 5

Survival Countdown

EXPLORATIONMAJOR EXPLORATION SITES

SITE-01OVERTURNED ECHO-4 OPERATIONAL VEHICLE

An overturned military rover at the bottom of a shallow ravine. Strange metallic sounds emanate from the broken windows.

◆ Loot: Emergency rations, first-aid kit, small amount of generator fuel

⚠ Danger: Swarms of mutated creatures attracted by the smell of blood and coolant

▶ Gimmick: Recovering the black box yields a map of the surrounding terrain

SITE-02SECTOR 47 MILITARY CHECKPOINT

A massive concrete barricade and rusted barbed wire. Signs of recent occupation.

◆ Loot: Air filters, gas mask parts, ammunition, canned goods

⚠ Danger: Hidden armed scavengers, tripwire traps

▶ Gimmick: Hacking the terminal provides bypass coordinates for the communication relay

SITE-03RUINS OF FIELD HOSPITAL FACILITY

Collapsed dome tents and concrete debris. Bodies in protective suits, the atmosphere distorts with a bluish haze.

◆ Loot: Iodine tablets, painkillers, antibiotics, medical alcohol

⚠ Danger: High-contamination zone (rapid radiation exposure), mutated creature nests

▶ Gimmick: Accumulated radiation risk based on time spent

SITE-04NORTHERN MOUNTAIN COMMUNICATION RELAY

A large antenna facility atop a rugged mountain peak. Lined with large-scale data processing and storage mainframes.

◆ Loot: Communication modules, high-efficiency batteries, radiation-shielded armored vehicle

⚠ Danger: Obsolete automated security systems (military drones, automated turrets)

▶ Gimmick: Accessing the mainframes may reveal suspicious circumstances, deepening distrust within the team

SITE-05CONCEALED UNDERGROUND DATA BUNKER

An underground server room behind a thick blast door. A perfectly preserved facility, filled only with the hum of white emergency lights and cooling fans.

◆ Loot: Top-secret data, experimental protective suit, special weaponry

⚠ Danger: Psychological warfare and betrayal from forces concealing the truth

▶ Gimmick: ?

FACTIONSSUB CHARACTERS

HAZARD — CRIMINAL ARMED GROUP

'Hazard': A group of marauders composed of criminals operating in the Gray Zone. They are an armed force that has grown by preying on civilians and Hoppers passing through the Gray Zone, using abandoned civilian air-raid shelters as their base, and absorbing new criminals who enter the Gray Zone. Their leader is 'Yang Gi-tae'.

⚠ WANTED — ARMED & DANGEROUSHAZARD

Yang Gi-tae45 years old · Male

LEADER · CRIMINAL

# Leader of 'Hazard'
# Boss of criminals
# Lawless individual of the Gray Zone

BOUNTY: EXTRADITION ORDER ACTIVE

HOPER — RADIATION IMMUNE SURVIVORS

'Hoper': Descendants of refugees who did not evacuate during the war, they have acquired partial immunity to radiation and have built their own society. They dream of migrating to safe zones but are repeatedly rejected by the government. Though numerous, they survive in small groups, and their overall leader is 'Han Ji-min'.

HOPER FACTION — LEADERMUTANT TYPE

Han Ji-min23 years old · Female

ALL-GROUP REPRESENTATIVE

# Leader of the Hopers.
# Twice the strength of an adult male
# Highly developed hearing (can detect an ant's footsteps in a storm)
# Poor eyesight.

RADIATION IMMUNITY: PARTIAL | STR: x2

⌨ SYSTEM CONTROL (COMMAND LIST)

💡 @A — Summarize narrative
📃 @B(Name) — Peek into inner thoughts
📊 @C — Generate random event
🔄 @D — End scenarioAdditional commands — Future updates planned
[ CMD-05 ] [ CMD-06 ] [ CMD-07 ] [ CMD-08 ]

👤 RECOMMENDED PERSONA FORMAT

💡 The more detailed the information, the more sophisticated the survival scenario the AI can construct.

Sergeant rank recommended.

- Name: _______________________
- Age: _______________________
- Gender: _______________________
- Appearance: _______________________
- Traits (Other): ___________________
- Background: _______________________
- Possessions: (Items carried upon entry. Preferences OK)

🔧 CREATOR'S COMMENT

❗️ Enjoy diverse gameplay using OOC. Enter as [OOC: Content] or OOC: Content.
❗️ Frequently using the @A (summary) command helps the AI remember key events.
❗️ We recommend playing with 'Disable Positive Responses' turned off in the model settings.
✨ [Gem 2.5/Gem 3.5/Opus tested] Tested. High-performance models are recommended for an immersive experience.
🧨 If you find any errors or have suggestions for improvement, please leave a comment, and we will address them with care.

🤝 SPECIAL COLLABORATION

This is a collaborative project planned with creator SSD!! The artwork is amazing, so please check out the link below and show your interest❤️

▶ SSD × ECHO-4 : PLAY LINK 👈(Click❤️)

REFERRAL CODE

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[ DAY STRUCTURE ]

PHASE 01

Daytime Action

External exploration / mission execution

PHASE 02

Night Maintenance

Rest / Bunker activities

RESOURCE DECAY

At the end of each night's maintenance
Filters, Fuel, Food each -1

[ 5-DAY SURVIVAL COUNTDOWN — TEAM ECHO-4 ]

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