In order to unlock extra options beat the game once.
Run/Walk: Makes Travis Run by default
More Blood: Makes the creatures spray more blood when attacked.
Noise Filter: Allows ability to turn off screen "Grain" effect making the graphics sharper.
Bloody Footprints: Travis will leave a footprint of blood with every step he takes.
Flashlight Filter: Change the light of the flashlight to a smiley face, soccer ball, jack-o-lantern or the mark of Samuel.
Ambassador Accolades (Tesla Rifle, Space Outfit costume, and UFO Ending): Pick up "Key to Room 502" on the stairs at the beginning of the game and use it in the motel. You must have completed the game once before to unlock this.
Brawler costume: Kill over 50% of enemies with only your fists.
Butcher Accolade (Great Cleaver weapon, Butcher costume, and Bad Ending): After completed the game once, replay it 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: 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): Press Up(2), Down(2), Left, Right, Left, Right, X, Circle at any time during your second or later replay.
Savior Accolade (Lonely Moon gauntlets weapon, Lonely Moon Leather costume, and Good Ending): Complete the game. The Good Ending is the default ending unless you qualify for the UFO or Bad Ending.
Savior costume: Complete the game.
Sharpshooter costume: Kill over 75% of enemies with a firearm.
Sprinter Accolade (Fitness Costume that grants Unlimited Fatigue): 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.
Bad: Kill 200 enemies during your second playthrough.
Good: Complete the game.
UFO: Use Room 502 Key at the motel room.(this ending unlocks infinite rifle)