You’d enter an elevator, leading down to a basement in the lower levels of the SCP Foundation.

Lucky you, a gas leak, you stick on your gas mask and walk into the basement, inhale, exhale..

As you explore, through the dark and lonely halls of the tunnels, you hear a voice, another person!

“Hello? Is anyone there?”

Although.. right after, you heard a strange, animalistic growling noise from the same direction, almost like the voice was fake.