Security 51

Security 51 is developed by Alawar and published by Alawar, released on 12 Aug, 2026.

You’re a security officer deep within Area 51. Scan the staff, verify clearances, and decide who can enter the elevator and who absolutely mustn’t leave. The deeper you go, the less certain you are that anyone standing before you is still human.

Basic Information

Store page feature tags: Single-player, Steam Achievements, Full controller support, Steam Trading Cards, DualSense Controller Support, Steam Cloud, Family Sharing.

Official Introduction Key Points

1. A “SIMPLE” JOB
2. 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.
3. SECURE, CONTAIN, PROTECT
4. 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.
5. TOTAL CONTROL
6. 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.
7. CONTAIN THE THREAT
8. 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.

Minimum System Requirements (Windows)

- OS: 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

Achievement Highlights

• You’re a Guard, Harry!
• Click-Clack!
• Here’s Your Pass!
• Next!
• What’s That Button For?
• One-Way Pass
• I Was Just Following Orders
• Quarantine

Related DLC

Available on the store page: DLC 4932880.

Official Screenshots

This page’s gallery section collects all 19 official screenshots of Security 51.

The content above is from publicly available data on the Steam store page. In case of any discrepancies with the store page, the store page shall prevail.