Security 51

Security 51

Steam: Mostly Positive 70%
Best price now$4.62Kinguin
Stores compared6
View on Steam ↗

Prices at every store

KinguinPartnerKey resellerCode : 5% off (until Oct 31) $4.62Buy →Steam-30% $9.99$6.99Buy →GOG-30% $9.99$6.99Buy →IndieGalaPartner $9.99Buy →GamersGate $9.99Buy →Fanatical $9.99Buy →

Steam prices come straight from Steam and link directly to the Steam store. Kinguin is a key reseller marketplace; its prices include the service fee and are for worldwide (region-free or "rest of world") PC keys. Other store prices come from the stores' own public catalogs and partner price feeds (GamersGate, IndieGala, GOG) and some links may be affiliate links: we or our data partners may earn a small commission at no extra cost to you. Learn more

Best price now$4.62Kinguin

Get a price drop alert

We'll email you when Security 51 hits your price.

✓ That's 20% below today's price.

Free · No account · Unsubscribe anytime

About Security 51

GenreAdventure, Indie, Simulation
Release dateAug 12, 2026
DeveloperAlawar
PublisherAlawar
PlatformsWindows · macOS

A "SIMPLE" JOB

Security 51 is an atmospheric security guard simulator inspired by Papers, Please, and SCP paranoia. You're on duty in the underground bunker of Area 51, where the most dangerous part begins at the elevator: the shaft descends for miles down to unknown levels. Whether it's laboratories, anomalies, inhumane experiments, or something alien—you're not supposed to know. Your task is simple: let in those who have access and stop those who don't... even if everything looks "right" on the surface.

SECURE, CONTAIN, PROTECT

Everyone who passes through your checkpoint carries papers and passes. Your job is to check names, positions, clearance levels, and time, ensuring the number of people entering and leaving matches, and pay attention to any oddities. As time passes you'll catch yourself thinking that something's wrong more and more, and the only thing to rely on will be the protocols. But even they can be wrong.

TOTAL CONTROL

With experience, you'll gain increasingly more accurate methods of identity verification, such as blood testing. Did that janitor simply open the wrong door, or are they a spy for an enemy government? Or are they not even human? When in doubt, quarantine the suspect. Sometimes you'll make mistakes and lock up an ordinary employee, and sometimes you'll find a titanium cell ripped open from the inside. Some decisions will have immediate consequences, others only after several shifts.

CONTAIN THE THREAT

The consequences of every mistake go far beyond issues in the workplace. Let the wrong person out, and the infection will ravage the city. Isolate suspicious employees, investigate anomalies, and launch new operations to contain the threat before it's too late.

Remember, it's not just about who you let in, but who or what you let out into the world.

Game info, media and description from Steam.