Full list of all 32 Silent Hill Homecoming achievements worth 1,000 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox 360.
Achieved Ending 1
Found all the Children's Drawings
Achieved Ending 2
.. Haven't Left This Place Complete game on HARD difficulty.
Alex ended his mother's suffering
Found Circular Saw
Found Laser Pistol
Achieved Ending 4
Alex forgives his father
Achieved Ending 3
Found all Serums
Achieved Ending 5
Defeated Amnion
Saved Wheeler
Alex does not forgive his father
Found ALL Photos
Defeated Asphyxia
Alex could not end his mother's suffering
Found Rifle
Defeated 1 Order member
Defeated Scarlet
Defeated 1 Siam
Defeated 1 Schism
Defeated Sepulcher
Defeated 1 Needler
Defeated 1 Smog
Defeated 1 Feral
Defeated 1 Lurker
Found 1 Serum
Found 1 Photo
Defeated 1 Swarm
Defeated 1 Nurse