
Various Improvements Update & Points Shop Items
Attention, agents! We've rolled out a new Security 51 update with 2 new story-related characters, several fixes, and QoL improvements. We're also excited to announce that…




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.
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.
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.
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.
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.
Security 51Steam announcement
Attention, agents! We've rolled out a new Security 51 update with 2 new story-related characters, several fixes, and QoL improvements. We're also excited to announce that…
Security 51Steam announcement
Attention, agents! The Endless Mode update is finally here! This major patch brings the long-requested Endless Mode, new Difficulty Settings, a brand-new inspection mechanic,…
Security 51Steam announcement
Great news, agents! Security 51 is now Steam Deck verified with a green checkmark. Device now fully supports the boots of Area 51 guard. Leaving your desk is no excuse to skip…
Security 51Steam announcement
Attention, agents! We've rolled out another update covering many long-requested quality-of-life features, balance adjustments, and overall game flow improvements. Please make…
Security 51Steam announcement
Attention, agents! First of all, thank you to everyone who joined us for the shift on launch day! Over the past few days, we’ve been closely reading all of your reviews, Steam…
Security 51Steam announcement
Attention, agents! We've rolled out our first post-release update, focused on improving gameplay flow, adding several quality-of-life features, and fixing a number of issues.…
Security 51Steam announcement
Attention, agents! The wait is finally over. Your desk awaits. Security 51 is out now! What’s new Grab your ID and get to work. The full game expands on all the features from the…
Security 51Steam announcement
Security officers, With only 5 days left until Security 51 launches, we’re making the final preparations for your first shift in Area 51. While we’re working on that, we also…