Security 51

Security 51 is an atmospheric security guard simulator set at an underground Area 51 bunker. You work at a checkpoint where an elevator shaft descends for miles to unknown levels. Below may be laboratories, anomalies, inhumane experiments or something alien, but you are not supposed to know. Your job is to admit people with access and stop those who do not, even when everything seems right on the surface.

Check the papers

Everyone passing through the checkpoint carries papers and passes. You verify names, positions, clearance levels and times, make sure the number of people entering matches the number leaving, and look for anything unusual. As your doubts grow, you have to rely on protocols, though those protocols can also be wrong.

Verify and contain

As you gain experience, you acquire more accurate ways to check identities, including blood testing. A janitor who opened the wrong door might be a spy for an enemy government—or might not be human at all. When you are unsure, you can quarantine a suspect, but mistakes may mean locking up an ordinary employee. At times, you may also find a titanium cell ripped open from the inside.

Stop the threat

Some decisions have immediate consequences; others take effect only after several shifts. Letting the wrong person out can allow an infection to ravage the city, so you isolate suspicious employees, investigate anomalies and launch operations to contain the threat. Your decisions determine not only who enters, but who or what gets out into the world.