Games like Security 51

Chasing that mysterious and replayable feeling you got from Security 51? These games offer a similar pull for your backlog.

That's not my Neighbor
It's 1955 and doppelgangers want into your building. As the doorman, you check papers, faces and phone calls, then decide who comes in and who gets handed to the D.D.D. A short, tense, oddly funny horror game about staring at a neighbor's eyebrows until you're sure.
Mysterious, Replayable, Dark
88% of 4,700 Steam reviews are positivePlayers online now: 146$2.99
Security Booth: Director's Cut
The year is 1996 and you’re employed by a science lab called Nova Nexus. You work as a security guard at the front gate to the lab, inside a guard booth. However, tonight it seems something important is happening inside of Nova Nexus and things are... well... a little strange.
Mysterious, Replayable, Atmospheric
90% of 275 Steam reviews are positive$4.99
Need to Know
Welcome to the Department of Liberty. Ascend the ranks of the NSA-like surveillance agency and decide: will you stand up for privacy, or help create an unstoppable police state? Spy on people’s deepest secrets, pick apart their private lives and decide their fate in this modern surveillance thriller.
Mysterious, Replayable, Atmospheric
74% of 175 Steam reviews are positive$14.99
Quarantine Zone: The Last Check
Run the checkpoint in a city overrun by the dead. Scan survivors for bites, fevers and hidden contraband, decide who enters, who waits in quarantine and who goes to the lab, then keep your camp fed, powered and defended. Every stamp matters, and one slip lets the plague walk right through.
Replayable, Atmospheric, Dark
81% of 12,653 Steam reviews are positivePlayers online now: 577$19.99
Nothing To Declare
Airport security without the stress. Weigh suitcases, read x-rays, question odd travelers and unzip the bags that smell like trouble, all in a hand-drawn, cozy world.
75% of 276 Steam reviews are positivePlayers online now: 10$9.99
Airport Contraband
A customs officer sim with a crooked streak. Check papers, scan luggage and weigh cargo at Caldora Airport, then decide who walks through: the law, or the cartel's courier. Every shift brings new stations, new risks and contraband hiding in plain sight. When one officer burns out, the next one starts smarter.
Also in Detective · Mysterious, Replayable, Dark
75% of 83 Steam reviews are positivePlayers online now: 105$17.99
Papers, Please
The October labor lottery picked your name. Now you stamp passports at the Arstotzkan border, deciding who enters and who waits in the cold. Every approved visa pays for your family's heat and food, every mistake costs you. A grim, gripping puzzle about paperwork, power and the people behind the documents.
Mysterious, Replayable, Atmospheric
97% of 73,769 Steam reviews are positivePlayers online now: 343$9.99
Interference: Dead Air
All hell's breaking loose in a mysterious research facility and the only person who can save the day is the night shift security guard in the booth outside. Remotely control systems, guide scientists to safety or just… goof off? You’re not in danger. Yet.
Also in Detective · Mysterious, Replayable, Atmospheric
71% of 76 Steam reviews are positive$14.99
🧠 OUT OF THE BOX
Dive into a wild story of gangsters and criminals where you decide the fate of the peculiar customers of a luxurious nightclub in a never-ending race against the clock.
Mysterious, Replayable, Tense
88% of 212 Steam reviews are positive$14.99
Doors Closed
To save your sick son, you take a job as a security inspector at a secretive lab, the very place rumored to be causing his illness. Inspect IDs, scan for contraband, and weed out impostors. Do your job, earn your paycheck, and save your family. Just don't let the wrong people in.
Mysterious, Replayable, Atmospheric
0% of 1 Steam reviews are positive$2.99
Lobotomy Corporation | Monster Management Simulation
You are the Manager of Lobotomy Corporation, an energy company that keeps monsters called Abnormalities in containment and milks them for power. Send employees in to work, guess what each creature wants, meet the daily quota, and hold the line when something breaks loose and sets off the next disaster.
Mysterious, Replayable, Atmospheric
94% of 53,820 Steam reviews are positivePlayers online now: 4,401$24.99
Beholder
You are the State's landlord in a totalitarian country. Bug apartments, sneak into tenants' rooms while they're out, and report anyone who might plot against the regime. Or don't: you have a family to keep alive, and every choice costs something. A bleak, darkly funny story with several endings.
Mysterious, Replayable, Atmospheric
91% of 23,384 Steam reviews are positivePlayers online now: 76$1.39

Cheaper than Security 51

That's not my Neighbor

Decide which neighbors are human and which doppelgangers get turned away, one nervous shift at a time.

$2.99

Security Booth: Director's Cut

The year is 1996 and you’re employed by a science lab called Nova Nexus.

$4.99

Beholder

Snoop through an apartment building for the regime, then decide which neighbors deserve to be reported and which secrets stay buried.

$1.39

Doors Closed

To save your sick son, you take a job as a security inspector at a secretive lab, the very place rumored to be causing his illness.

$2.99

I'm on Observation Duty

One long night, a wall of monitors and your memory as the only tool: spot what changed before it's too late.

$2.99

Self-Isolation

This game is a simulation of self-isolation. You need to support your family, not to lose your job and finally not to go crazy.

$4.99

Not Tonight

Work the doors of a dystopian Britain, checking IDs and guestlists against the clock while your choices decide how far you'll go to stay in the…

$2.99

The Mailroom

A cozy horror job in hell's mailroom, where occult parcels, cursed machines and the building's secrets fill your workday.

$7.99

Lil' Guardsman

Interrogate over 100 visitors at the castle gate and decide who gets in, one shift at a time.

$3.99

Alien Morgue

You're an alien pathologist. Search the Database for alien physiology and dissect bodies to figure out what caused death.

$7.99

Underchoice

Become the overseer and shape the fate of those who come knocking at the door.

$7.99

Next Patient

As the checkpoint guard in the only safe zone of the dystopian Republic of Valdoria, you decide who survives.

$5.99

Hidden gems like Security 51

The Mailroom

A cozy horror job in hell's mailroom, where occult parcels, cursed machines and the building's secrets fill your workday.

$7.99

Thank You For Your Application

A dystopian job interview sim set in Aeropolis, 2066. Screen resumes against rules that change daily, decide who eats this month, then go home to…

$13.99

Security: The Horrible Nights

Every time you die, a new story begins. You are the nighttime security guard at a hospital.

$4.99

I'm on Observation Duty 6

A night of camera feeds where spotting the smallest wrong detail is the whole job, and the whole dread.

$11.99

THRESHOLD

Keep a lonely mountain border post running by blowing the whistle on schedule, while the thin air drains you and something strange takes hold.

$9.99

Shift At Midnight

Run a 1990s gas station by night and figure out which customers are only pretending to be human.

$9.99

Dead Signal

A night shift on the wrong side of the cameras. Watch 23 hacked feeds, file reports on schedule, and hand-deliver shady packages while hitmen stalk…

$12.99

That's not my Neighbor

Decide which neighbors are human and which doppelgangers get turned away, one nervous shift at a time.

$2.99

Nothing To Declare

Run a friendly checkpoint booth: weigh luggage, scan x-rays and decide who gets through, all at your own pace.

$9.99

I'm on Observation Duty 5

Watch the cameras, spot what changed, and report it before the anomalies pile up past saving.

$9.99

Airport X-Ray Simulator

Step into the critical role of a baggage security operative in Airport X-Ray Simulator.

$12.99

Go Home Annie: An SCP Game

A twisted psychological thriller and an original story set in the SCP universe.

$19.99

Newest games like Security 51