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Security 51

Updated v1.1.1.219

Security 51 is a horror security simulator where you work the night shift at an underground bunker in Area 51. You must verify identities by checking names, positions, clearance levels, and documents, then use fingerprint analysis, blood tests, UV lights, body scanners, and cameras to detect anomalies. Quarantine suspicious personnel, follow protocols, and face consequences for your decisions across multiple shifts with different endings.

Adventure Hidden Object Pixel Graphics Point & Click Simulation
Security 51
Release Date:
Platform:
Windows (10, 11)
Developer:
Alawar
Publisher:
Alawar
About this game

Security 51 Overview

A “SIMPLE” JOB

Security 51 is an atmospheric horror 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, passes, or verbal orders. 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. These could be incorrect answers, behavior that deviates from protocol, slurred speech, or even documents that seem too perfect. 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 fingerprint verification or 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.

Can Your PC Run It?

System Requirements

Minimum:
  • System: Windows 10 64 bit
  • Processor: Intel Core i5-6400 or analog
  • Memory: 8 GB RAM
  • Graphics: AMD Radeon RX 550 or NVIDIA GeForce GTX 960
  • Storage: 2 GB available space
  • Additional Notes: Stay Hydrated
Easy Install and Play

Instructions

  1. Click the download button. You can also select a previous version if available.
  2. You’ll be redirected to Vidgazoo. Wait 5 seconds, then directly click the button or copy the link.
    • Make sure you have a supported download client installed (it’s free here) before downloading.
  3. Once the download process reaches 100%, locate the downloaded files.
    • Get ready for installation and make sure you have enough disk space for the game.
  4. To Install DRM-free Security 51:
    • Run or double-click setup_security_51_********.exe to launch the installer.
    • Follow the on-screen instructions to complete the installation.
    • If a DLC folder is included, run any .exe files inside it as well.
  5. Once the installation is complete, launch the game and start playing.

Need help?
Check our FAQs for common questions and fixes. If you need additional assistance, you can also visit the official GOG Support Center.