simultaneous evacuation

Exploration Stage: Octopus Citadel
From: Mr. Black
Description: Let's split up. That way, we should be able to check out the security station headquarters quickly. See that floor plan over there? We'll meet at the red marker. That shows where the warning lights are. Find it and wait there.
Completed: All the other warning lights seem to have broken, but this one seems to have miraculously survived. This was the one I turned on just before the security station was engulfed by the fog. The warning beep sounded, the light switched on, and all those in the building began evacuating at once.