i was nostalgic so i looked up a list of some things from the game ;o
source
http://silenthill.wikia.com/wiki/Hauntings#Hauntings
wow you know this game looks better than alan wake and it's like 6 years later, lol
* Bloody chair - Blood will appear all over Henry's chair, the one beside the window in his living room. (upon examination)
* Slippers - The slippers by Henry's front door will have disappeared, and left bloody footprints leading to the kitchen, where they stay.
* Shadow boy - A shadow of a young boy (possibly the child Walter or Billy Locane) will appear in the closet, point at you and cry.
* Cat in fridge - A "lump of flesh" will meow and move inside of Henry's refrigerator. This is a reference to a woman, who also lived in Henry's apartment, that had her pet cat shot by a man who had a cat allergy and a hobby for guns. She mourned over her dead cat and put its body in her refrigerator.[1]
* Ghost victim - A ghost will come for a visit through your wall. It resembles Jimmy Stone.
* Blood on wall - Blood that resembles cracks or vines will appear on Henry's wall. If Henry stands close to the blood, it will move and pulse.
* Clock - Henry's clock will tick rapidly.
* Windows - Henry's living room windows will rattle up and down.
* Phone - The phone in Henry's bedroom will deliver Joseph Schreiber's voice saying: "I'm always watching you. I'm always WATCHING you. I'm ALWAYS watching you."
* Peephole - Henry's peephole will bleed. Examining it from a distance will allow the player to see a ghost version of Henry with '21121' carved in the front of his neck, and supposedly saying 'Please help me,' but this cannot be heard.
* Sink - The kitchen sink's faucet will pour blood.
* TV - The TV will turn on and deliver static, and it will show, in a flash, the moving picture of a twitching, upside down man[2] (possibly Joseph Schreiber or Andrew DeSalvo).
* Picture - The picture of the Balkan Church in Silent Hill, the one in Henry's bedroom, will turn into a picture of Walter Sullivan.
* Shabby Doll - In the Apartment World, Walter Sullivan will offer Henry an optional item, the "Shabby Doll" that Eileen had given him when she was a little girl. If Henry takes the Shabby Doll and puts it in his box, several crying babies will appear over it. This is completely optional, and is the only haunting that can be avoided before the game's second part.
edit Other notable things
Robbie, pointing menacingly...
* There may be a floating head[3] outside of Henry's living room window. This head appears to be Andrew DeSalvo's. It will briefly fly up and down and disappear when you return from Building World.
* Robbie the Rabbit, the pink rabbit stuffed animal in Eileen's room will move after the player finishes the Hospital World. It now faces Henry's room, pointing at him with blood around its mouth.
* There is a Robbie the Rabbit hot air balloon which can be seen in the sky outside Henry's window sometimes.
* By looking through the peephole, Henry may see Walter Sullivan looking back at him, an alternate Henry or a sentence written in blood: "BETTER CHECK ON YOUR NEIGHBOR SOON!"
* If the player inputs the phone number on the billboard found outside of Henry's window into his phone, ghosts and monsters can be heard making strange noises and sounds in the Otherworld.