A CITY ON THE EDGE / A TACTICAL CYBER THRILLER

NIGHTFALLTHE LAST LINE OF DEFENCE

Keep the lights on.

Thirteen sectors. One connected city. Route your signal, outthink the next attack, and bring the network back from the brink.

TACTICAL CAMPAIGN + 5 ARCADE MISSIONS PROGRESS SAVED LOCALLY

SENTRY CENTRAL / COASTAL SECTORThe city never sleeps.
Neither does the threat.

CITY LINK ESTABLISHED / FICTIONAL SIMULATION

NIGHTFALL PROTOCOLAWAITING OPERATOR

CAREER SCORE0

TRAINING RECORD0 / 05 cleared

BEST SINGLE RUN—

SECURITY CLEARANCE

Recruit0%

1,000 points to Analyst

THE ARCADE COLLECTION / SELECT YOUR DISCIPLINE

Five ways to hold the line.

Five arcade drills for precision, memory, deduction and reaction. The live network campaign is a separate tactical operation.

OPERATION PROGRESS

The city is counting on you.

Clear five objectives to complete NIGHTFALL.

CLASSIFIED / OPERATOR FIELD MANUAL

Know the signal. Own the response.

NIGHTFALL is a fictional tactical network game with five optional arcade drills. The campaign rewards planning, recovery order, and knowing when to disconnect a threatened system.

01 / THE OPERATION

Five fronts. One objective.

Recover key segments from Power, Hospital, Uplink, Exchange and Transit. Select a sector and plot a route, then fire an echo. It clears 28 corruption immediately and 35 after your following action. A returning echo recovers its destination if corruption is at most 20 and the sector remains connected to the core.

Every action advances the enemy’s forecast move. Shields block damage for three cycles. Isolating a line stops spread but may take services offline or sever an echo. Recovery order grants different abilities, and two command decisions permanently modify the operation. Lose if the core reaches 100 corruption or service stays below 40% for three cycles.

The network campaign, career points and training records save automatically on this browser. New operation restarts only the network; Reset clears all progress after confirmation.

02 / CONTROLS

Built for keyboard. Ready for touch.

Firewall Breach & Packet Interceptor: Move with ← →, the mouse or a finger. Launch the firewall probe with Space.
Decrypt Sequence: Watch the sequence, then repeat it using the four pads or keys 1–4.
Cipher Vault: Type a five-letter term. Enter submits, ⌫ deletes. An on-screen keyboard is included.
Threat Response: Tap the lit sensor or press 1–9 in reading order. Gold alerts pay double. An incorrect response costs 10 points.
Any mission: Esc pauses or resumes. Home returns to Command. Restart begins a fresh run with its score at zero.

03 / SCORING

Precision pays.

Firewall combos reset when the probe hits your shield. Six consecutive nodes increase your multiplier. Packet combos rise every five clean catches; missed packets break the chain.

Decrypt sequences pay per symbol plus a round bonus. Vault guesses pay 600 down to 100 points across six attempts. Threat Response rewards fast reactions and doubles points for gold alerts.

Mission scores start fresh on every retry. Career points remain banked. Leaving a started run records its score; a briefing alone does not count as a played mission.

04 / THE CLEARANCE LADDER

From recruit to command.

Recruit · 0 points: Everyone starts on the night shift.
Analyst · 1,000 / Responder · 2,500: Read the signals. Close the gaps.
Threat Hunter · 4,500 / SOC Commander · 7,000: Anticipate the attack. Control the response.
Cyber Legend · 10,000: The highest clearance. The next record is yours.

No real networks, accounts or systems are accessed. All activity shown is part of the game.

● SENTRY TELEMETRY[00:00] Perimeter scan complete. Five vectors available. Awaiting operator.

NIGHTFALLTHE LAST LINE OF DEFENCE

Keep the lights on.

Five ways to hold the line.

The city is counting on you.

Choose your point of entry.

Know the signal. Own the response.

Five fronts. One objective.

Built for keyboard. Ready for touch.

Precision pays.

From recruit to command.

Watch the night. Study the plates. Hear the watch.

The operation film.

One plate at a time.

Operation briefing.

Tactical Cyber Triage in Sentry Nightfall

Firewall Breach

Standing by.

A city on the edge.

Every recovery changes the rules.

The signal returns.
Make it count.

A new night. A different attack.

Perimeter breached.

Start a new watch?