Black Mesa🚨Interloper Elevator Ascent & Nihilanth Lair Alarm Sound Effect🚨

Black Mesa, 🚨alarm can be heard in Chapter 17: Interloper at the Elevator Ascent platform while fighting Alien Controllers and Alien Grunts as the platform ascend towards the Nihilanth portal zone. And another alarm at Chapter 18: Nihilanth, the sounds can be heard when the Nihilanth about to be defeated. Black Mesa Official Webpage: https://www.crowbarcollective.com/gam... Black Mesa on Steam: https://store.steampowered.com/app/36... Note: This video and its sound is exactly the same as Interloper Elevator Ascent alarm from the previous video uploaded in 5th/6th March 2026, but this video added together with the Nihilanth's Lair images, where I forgot about that final chapter have that same alarm sounds.