Steam app 4246860 · updated 12 Sep 2026, 19:35 UTC
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.
717 hourly samples, with the daily peak drawn over them. Weekends are shaded.
2 months, August 2026 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.
The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.
Security 51 was released on 12 Aug, 2026.
19 days as the curve, each the highest figure that day. Behind it, 436 hourly samples from 13 Aug, which is as far back as the source keeps every hour. Weekends are shaded.
12 days as the curve, each the highest figure that day. Behind it, 281 hourly samples. Each dip is a night. Weekends are shaded.
Security 51 was released on 12 Aug, 2026.
The player takes the role of a security officer working in a high-security research facility. As part of the inspection process, employees and scientists must be examined for anomalies and physical inconsistencies. Some inspections involve using a body scanner that can reveal partial nudity beneath clothing. These scenes are presented solely as part of the gameplay mechanics and are not intended to be sexual or erotic in nature.
| Language | Full audio |
|---|---|
| English | |
| Simplified Chinese | |
| Russian | |
| French | |
| German | |
| Spanish - Spain | |
| Traditional Chinese | |
| Polish | |
| Portuguese - Brazil | |
| Japanese |
A blank audio cell means full audio was not marked in the returned language list.
68 achievements in total.
17 developer announcements, May 2026 to Sep 2026 · times in UTC
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 51 Points Shop items are finally available!List of…
addvansAttention, 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, fresh story characters, and several quality-of-life adjustments.…
addvansGreat 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 the shift: check visitors on the couch, run X-Ray scans on the…
addvansAttention, agents! We've rolled out another update covering many long-requested quality-of-life features, balance adjustments, and overall game flow improvements. Please make sure your game is updated to the latest version. Improvements…
addvansAttention, 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 discussions, bug report forms, and Discord messages - both…
addvansAttention, 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. Please make sure your game is updated to the latest version. We…
addvansAttention, 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 demo: More to inspect - brand-new blood sampling mechanics…
addvansSecurity 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 wanted to share the exact release time and let you know how much…
Amber JamDear agents, To celebrate the upcoming release of Security 51, we’re giving away 20 copies of the game on our Discord server! {STEAM_CLAN_IMAGE}/45947869/8d4f48643282584aedcf3dd62ec5c76fb2a92782.gif 10 free-for-all winners will be chosen…
addvansDear agents, Thank you for your hard work during the demo! All the feedback you provided helped us improve the overall game experience. Security 51 official release date has been moved to August 12th. We made this decision to give the game…
addvansDear agents,Thank you for your service during the playtest and the demo. Your probation period has been successfully completed.Your reports have been reviewed. Your observations have been filed.Today, we’re pleased to confirm that your…
Amber JamGreetings, security officers.We’ve reviewed reports from recent shifts and made several adjustments to checkpoint procedures. Thank you for helping us identify inconsistencies in the facility’s operations. Please, make sure that you have…
Amber JamIf you haven’t tried the Security 51 demo yet, now is the perfect time to start your shift.We’ve added lots of new content since the playtest, including reworked shifts, infection tracking, new events, and much more.Give the demo a try and…
Amber JamDear agents, A few weeks ago, thousands of you joined the Security 51 playtest and stepped into your first shifts deep beneath Area 51. Since then, we’ve been carefully reviewing your reports, discussions and feedback. The demo includes…
Amber JamOur first Security 51 playtest is over. Guarding the top-secret military object is no joke - and we thank you all for your hard work! {STEAM_CLAN_IMAGE}/45947869/f0047edbad325be9f87141bdf84f5c917f3cb111.png Playtest stats: 7,000 unique…
addvansWe have released a playtest update that includes balance changes and fixes for critical bugs. Important: with this update, old saves may become corrupted, which will significantly affect gameplay. We recommend starting a new game after this…
addvansDear agents, Security 51 is a simulator of an Area 51 security officer. Guard the elevator decending from the surface into the endless depths of the underground laboratories. Only you decide who goes in and who gets to leave. Verify papers…
addvansEverything Steam lists as add-on content for this game, newest first. Prices are left out on purpose: the store answers this page in one currency and it is not the reader's.
| Name | Platforms | Released |
|---|---|---|
| Security 51 Soundtrack | WindowsmacOSLinux | 12 Aug 2026 |
What Steam runs, and with what. Straight from the app configuration.
| Description | Executable | Arguments | Platform | |
|---|---|---|---|---|
| Launch | Security51.exe | windows | ||
| Launch | Security51.app | macos |
The folders Steam Cloud syncs. The root is a token Steam uses for a location on your own machine, not a path this page can know.
| Root | Folder | Files |
|---|---|---|
WinAppDataLocalLow | \Alawar\Security51\Release\Build | * and below |
MacAppSupport | com.Alawar.Security51\Release\Build | * and below |
It runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG