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Security 51 (Steam Account)
Difmark4โขActivate on: SteamโขStandard
$3.11 Get -
Security 51 Steam CD Key
K4G3.8โขActivate on: SteamโขStandard$4.93 Get -
Security 51 (PC) - Steam Key - GLOBAL
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Security 51 (PC) - Steam Key - GLOBAL
G2A.COM4โขActivate on: SteamโขStandard$4.97 Get-10% $5.53 -
Security 51 (PC)
Difmark4โขActivate on: UnspecifiedโขStandard
$5.68 Get -
Security 51 Steam Account
K4G3.8โขActivate on: SteamโขStandard$5.99 Get -
Security 51
WinGameStore4.8โขActivate on: SteamโขStandard
$6.49 Get-35% $9.99 -
Security 51
Fanatical4.6โขActivate on: UnspecifiedโขStandard$7.89 Get-21% $9.99 -
Security 51 (PC) - Steam Account - GLOBAL
G2A.COM4โขActivate on: SteamโขStandard$8.22 Get-10% $9.13 -
Security 51 (PC) - Steam Account - GLOBAL
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Security 51
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Security 51
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Security 51
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Security 51
IndieGala4โขActivate on: SteamโขStandard
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Security 51
Activate on: SteamโขStandard$9.99 Get -
Security 51 (PC) - Steam Gift - GLOBAL
G2A.COM4โขActivate on: SteamโขStandard$13.32 Get -
Security 51 (PC) - Steam Gift - GLOBAL
G2A.COM4โขActivate on: SteamโขStandard$13.96 Get -
Security 51 Steam Gift
K4G3.8โขActivate on: SteamโขStandard$14.15 Get
About Security 51
A "SIMPLE" JOB
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 alienโyou'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 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.
TOTAL CONTROL
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.
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.
Game Specifications
- Single player
- Windows
- Mac
System Requirements
Windows
Minimum
- 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
macOS
Minimum
- OS: OSX Big Sur 11.7.10 or newer
- Processor: Apple M1
- Memory: 8 GB RAM
- Storage: 2 GB available space
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Price History
Frequently asked questions about Security 51
What is the cheapest price for Security 51 Steam key?
The cheapest redeemable Steam key currently listed is $4.93 at K4G. The cheapest account offer is $3.11 at Difmark. Account offers provide login credentials instead of a key you redeem on your own account. Prices were last checked on November 1, 2026.
View key offersWhat is the difference between key and account offers for Security 51?
Gamescade currently lists 14 redeemable keys and 4 account offers. A key is redeemed on your own account, while an account offer provides access to a separate account containing the game.
View key offersWhat are the PC system requirements for Security 51?
Minimum PC requirements for Security 51 include an Intel Core i5-6400 or analog CPU, 8 GB RAM, a GPU with AMD Radeon RX 550 or NVIDIA GeForce GTX 960, and 2 GB of available storage. See the full requirements below.
What is the Security 51 release date?
Security 51 was released on August 12, 2026.
Is Security 51 single-player, multiplayer, or co-op?
Security 51 is listed as a single-player game. No multiplayer or co-op modes are currently listed.
Where can Security 51 offers be activated?
Current Security 51 key offers can be activated on Steam. Check the retailer page for region restrictions before buying.
Which platforms have active Security 51 deals?
Gamescade currently lists active Security 51 deals for PC.
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