Approach carefully

The front door of the apartment makes a noisy creak as you push it open. It opens up into the gloom of a lobby, covered in dust. As your eyes adjust to the darkness you see an old reception desk to your left, chestnut in color but deeply water-stained and cracked. On your right is what looks to be patio set, but some parts are folded up and others are so badly damaged that you can't really tell. When the room looks safe enough for your standards though, you approach the main hallway, where the first floor rooms are located.

Once upon a time, this hallway must've been lit up from end to end with lamps hanging off wall brackets, but now the hallway is almost pitch black, its brackets stripped bare of ornaments and its wallpaper peeling off in little bits. You gaze solemnly down the hallway, hearing only silence. You exhale excitedly as you begin your search through the apartment.

Nudging open the first room, you enter with Becky pointed straight ahead, ready to fire. There is an old bed in the corner of the room, but otherwise fairly plain. You spend a few seconds inspecting the room and then you turn to leave, when something in the corner of your eye catches your attention.

You see something indistinguishable underneath the bed and quickly stride towards it, rifle at the ready. You stand still at the foot of the bed, barrel trained underneath it, but the darkness of the room is overpowering and you can see anything. A few moments later, when there doesn't seem to be any movement, you decide to take a risk and pull out your flashlight.

Shining the glare underneath the bed you see that the shape is actually just a stain on the floor. As the light shines down on it, a dread grows in your heart as you realize that the stain was made with at least a pint of somebody's blood.

You quickly flip over the bed to get a better look and are stunned by what you see. What you thought was just a bloodstain is actually part of a large drawing underneath the bed. It is in the shape of a pentagram and drawn in with somebody's blood. You stumble back in shock as you stare at the symbol on the ground, and quickly turn to leave, wanting to be out of that room as quickly as possible.

As you move deeper and deeper into the abandoned apartment, the rooms start to become increasingly bizarre and alien. In another room, there is strange markings and thick writing on the walls, like written with charcoal, and it is scrawled in an unknown language. And in an even worse room, there is nothing but an altar, draped with a green cloth and a very large bloodstain right in the middle. Atop the altar lies a bloody knife. Still fresh.

"What the hell's been going on here?" You mutter quietly.

Suddenly, there is rattling in the room beside you, like someone just dropped a plate or a jar, and then a scuttling of steps. It's him, you think. You spin around and quickly exit the room.

You see a dark figure rush by as you turn the corner. It is large, heavy, and has a lumbering quality to it, but it somehow carries itself with incredible speed and dexterity. It is only in your field of view for a second and then blurs itself away, but you saw where it ran off to. You can still chase the figure if you wanted to.