SCP-087:Horror Stairs

You were invited to participate in a certain experiment for a tidy sum. Arriving at the place, you realize that in front of you is an old abandoned hotel somewhere in the mountains. The task is simple, go from one point to another. The problem is that in front of you is a staircase descending, and something lies in wait in the darkness of these flights of stairs ...

WASD - to move in space. Mouse - for a circular view.
To pick up an item, point the camera and press the left mouse button.