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

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


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.


Extra Costumes
     Unlock these costumes for Alex after beating these certain endings.

Bogeyman a.k.a. Pyramid Head Helmet: Unlocked by getting the "Bogeyman" 
                                     Ending

Deputy Alex: Unlocked by getting the "UFO" Ending

Order Soldier Outfit: Unlocked by getting the "Drowning" Ending

Orderly Alex: Unlocked by getting the "Hospital" Ending

Trucker Alex: Unlocked by getting the "Good" Ending


Extra Weapons
     To unlock two new weapons, beat the game at least once.

Circular Saw: Can be found in the garage at the Shepard's family home

Laser Pistol: Can be found in Joshua's room, on top of his foot locker


Extra Scene
     Collect all the photos and you will see a extra scene 
     after the credits end.