Silent Hill: Homecoming Cheats

Young Alex Costume
At the press start screen if you input this code you will unlock the young Alex Costume.

[Up], [Up], [Down], [Down], [Left], [Right], [Left], [Right], [Circle]: Unlocks Young Alex Costume

Achievements
Complete each achievement to get the allotted gamerscore.

Alchemilla's Finest (10): Defeated 1 Nurse
Clear the Air (10): Defeated 1 Smog
Creeper Reaper (10): Defeated 1 Swarm
Eddie's Legacy (10): Defeated 1 Feral
Health Junkie (50): Found all Serums
Josh's Gallery (50): Found ALL Photos
Kaufmann's Handiwork (10): Found 1 Serum
Lock 'n' Load (25): Found Rifle
Lurk No More (10): Defeated 1 Lurker
Nursery Rhymes (50): Found all the Children's Drawings
Out of Order (10): Defeated 1 Order member
Shades of James (20): Defeated 1 Siam
Sightseeing (10): Found 1 Photo
Split Personality (10): Defeated 1 Schism
The Old Gods... (100): .. Haven't Left This Place Complete game on HARD difficulty
To The Point (10): Defeated 1 Needler

Endings *SPOILERS*
Here is what Alex has to do to unlock the endings in the game.

"Bogeyman" Ending: Don't forgive your father, don't kill your mother, and don't save Wheeler.
"Drowning" Ending: Don't forgive your father, but do kill your mother.
"Good" Ending: Forgive your father and kill your mother out of mercy.
"Hospital" Ending: Forgive your father and don't kill your mother.
"UFO" Ending: Similiar to the Bogeyman ending. Don't forgive your father, don't kill your mother, BUT do save Wheeler.