☊ Without - Automatic Diagnostic and Announcement System - Half-Life &...

From the Soundboard:

In-game scene from Black Mesa featuring an alarming moment with a creature in the hall, showcasing Half-Life's intense atmosphere.
Automatic Diagnostic and Announcement System - Half-Life & Expansions - Black Mesa (PC - Computer)
Explore Full Soundboard 214 sounds • 47,739 plays

Top Sounds from Automatic Diagnostic and Announcement System - Half-Life & Expansions - Black Mesa (PC - Computer)

...and 189 more sounds