Here is a small part of the Game's script featuring the first Demon/Spirit you encounter.
I rewrote it from the script version too a book version so you can imagine it better.
"...A Small figure seemed to crawl in from the fog, Erica looked on with horror, one half of it's body almost completely gone, all that was left, were the crimson stained bones, and small bits of flesh clinging onto what was left. It's legs completely torn off, it's legs were replaced by the dragging organs leaking from the body. It's skin was completely pale, blue veins visible through the skin. As it got closer Erica realized it was a baby, or what was left of it. Erica dropped to the ground and covered her head, tears streaming from her eyes. "I want to leave...I want to leave...Get away...Get Away!" she screamed, the creature stopped for a moment, then started to smile, It's eyes got wide for a moment, then let out an ear bursting scream. "Make it stop!!!" Erica screamed out, the creature continued it's howl and started moving to Erica once again. The creature grabbed her leg, Erica let out a scream..."
I can really imagine the panic you'd get ingame.