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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.
Where to buy
Prices for US · Updated 10/7/2026
News
Security 51 Gets a Major Free Update With Endless Mode - DLH.net
DLH.net · 8/27/2026
Security 51 Adds Endless Mode in Major Free Update - Capsule Computers
Capsule Computers · 8/27/2026
Security 51 Is Out Now and It Wants to Know If You Can Trust Your Own Paperwork - GNL Magazine
GNL Magazine · 8/18/2026
Security 51 PC Review - Thumb Culture
Thumb Culture · 8/18/2026
Security 51 | Media - Screenshots - DLH.net
DLH.net · 8/15/2026
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