Sewer cover plate dragged

Alien gurgle & echo

Alien rising pulses

Alien whoosh & echo

Alien clicking & watery echoes

Underground parking garage ambience

Door slamming - large fantasy door

Door slamming - fantasy door

Door slamming - small fantasy door

Drainpipe water gurggling

Drain water gurggling

Heavy bubbles gurggling

Cave ambience

Scary strings in dark space

Horror ambience with dripping & broken piano

Room tone - underground corridor - low rumble

Subway ambience - crowd walla as train arrives

Train leaving subway station

Parking lot ambience (Underground)

Train passing through subway station

Ocean waves on beach