Cheats

Accolades

Ambassador Accolade - Starman-style Space Outift - Used the 502 room key in Riverside Motel/UFO Ending (Reward: Tesla Rifle)
Brawler Accolade - Mexican Wrestler Outfit - Killed 50% or more monsters with your fists
Butcher Accolade - Bloody Clothes - Killed 100 or more monsters and beaten the game normally (Reward: Great Cleaver)
Cartographer Accolade - Cartographer Outfit - Looked at map less than 25 times
Codebreaker Accolade - Vincent - Entered the Konami code U,U,D,D,L,R,L,R,X,O during anytime on your next game
Collector Accolade - Collector Outfit - Collected more than 300 items
Daredevil Accolade - Dog Fursuit - Never saved the game once
Explorer Accolade - Explorer Outfit - Walked more than 22.5 km
Fireman Accolade - Fireman Uniform - Saved Alessa from the house in less than 80 seconds (Reward: Fire Axe)
Savior Accolade - Lonely Moon Leather Outfit - Beaten the game once (Reward: Moon Gauntlets)
Sharpshooter Accolade - Survivalist Clothes - Killed 75% or more monsters with firearms
Sprinter Accolade - Cross Training Clothes - Beaten the game less than 2 hours (Reward: No fatigue when worn)
Stalker Accolade - Black Ops Outfit - Had the flashlight on less than 3 hours (Reward: Night Vision Goggles)
Weaponsmith Accolade - Streetfighter Clothes - Killed 75% or more monsters with melee weapons

Alternate Endings

Bad Ending - Defeat 200+ enemies (Available only after beating the game once)
Good Ending - Beat the game
UFO Ending - Use the item "Room 502 Key" at the Motel

Tesla Rifle

How to unlock Tesla Rifle: Beat game once & save. Reload game save & find room key 502. It is north of the hospital, up the long flight of stair's at the top of them. Play thru the game until you are at the Motel level. Use it to open the door & you will get the UFO ending. Save your game & reload it & the Tesla Rifle will be in your inventory.

Silent Hill Origins Unlockable: All Endings

Below is a list of the endings (non-spoiler).

Ending I - Finish the game the first time
Ending II - Kill at least 200 enemies on a cleared game
Ending III - Open Room 502 at the motel on a cleared game

Silent Hill Origins Unlockable: Extra Options

Finish the game the first time to unlock the following extra options (when playing a cleared game).

Walk/Run - Change the default movement mode between running and walking.
Extra Blood - Self-explanatory.
Noise Filter - Adjust the radio noise.
Bloody Footsteps - Leave bloody footprints.
Torch Projection - Make the flashlight project images of various objects.

Silent Hill Origins Unlockable: Items

To unlock the secret items, fulfill the corresponding requirements.

Fire Axe - Get the Fireman accolade
Great Cleaver - Get the Butcher accolade (Ending II)
Moon Gauntlets - Get the Savior accolade (Ending I)
Tesla Rifle - Get the Ambassador accolade (Ending III)

Unlockables
Successfully complete the indicated task to unlock the corresponding bonus:

Ambassador Accolades (Tesla Rifle, Space Outfit costume, and UFO ending): Successfully complete the game. Then, pick up "Room 502 Key" on the stairs at the beginning of the next game, and use it in the motel.

Brawler costume: Kill over 50% of enemies with only your fists.

Butcher Accolade (Great Cleaver weapon, Butcher costume that grants immunity from Straightjacket acid spit, and Bad ending): Successfully complete the game. Then, start a new game from your cleared saved game, and accumulate 100 kills. At the end of the game (not the UFO ending), you will see what Travis has become.

Cartographer costume: Check the map less then 25 times.

Collector costume: Collect more then 300 items.

Daredevil: Successfully complete the game without using any saved games.

Explorer costume: Run or walk over 22.5 km.

Fireman Accolade (Fireman's Axe weapon and Fireman Costume): Rescue Alessa from the fire at the start of the game in under 80 seconds.

Konami Code Accolade (Vincent from Silent Hill 3 costume): At any time during your second or later replay, press Up(2), Down(2), Left, Right, Left, Right, X, Circle.

Savior Accolade (Lonely Moon gauntlets weapon, Lonely Moon Leather costume, and Good ending): Successfully complete the game with the Good ending. The Good ending is the default ending unless you qualify for the UFO or Bad ending.

Savior costume: Successfully complete the game.

Sharpshooter costume: Kill over 75% of enemies with a firearm.

Sprinter Accolade (Fitness Costume that grants Unlimited Fatigue): Successfully complete the game in under two hours.

Stalker Accolade (Night Vision Goggles and Black Ops costume): Have the flashlight on less than three hours during the game.

Weaponsmith costume: Kill over 75% of enemies with melee weapons.

Infinite Rifle
Unlock the UFO ending to get the Infinite Rifle.

Moon Gauntlets
Successfully complete the game to unlock the Moon Gauntlets.

Bonus options
Successfully complete the game to unlock the following options:

Walk/Run (toggles running or when Square is held)
Extra Blood (creatures more bloodied when attacked)
Noise Filter (sharpens the graphics)
Bloody Footprints (always leave bloody footprints)
Torch Projection (project image of smiley face, soccer ball, jack-o-lantern, or the mark of Samuel from flashlight)

Endings
Successfully complete the indicated task to unlock the corresponding ending:

Bad: Kill 200 enemies during your second playthrough.
Good: Successfully complete the game.
UFO: Use Room 502 Key at the motel room.

Password for heart in hospital
At the start of the game in the hospital, there is a box with a heart inside. You need a password to open it. The clue is "Remember, the three beauties who cause it to pump so are the key, 'age before beauty'". The code is "23, 31, 19" (via the order you will find them in).

Alter Night Vision Goggles
Unlock the Night Vision Goggles, and have them equipped. In the Exam Room of Alchemilla Hospital is an X-ray screen with "Sarah 19" written on it. Examine the X-Ray while wearing the Night Vision Goggles. You will see an image of the Goggles on the screen. The image changes location, and seemingly its shape, if you alter your position in front of the X-ray before examining it.

*Source : cheatcodes.cc

Silent Hill Origins Cheats