Unlockables brought to you by 
Alternate Endings
You have to exorcise more than 80% of the paranormal phenomena that appear in your appartment and Eileen have to die during final battle.
The Death of Eileen
You have to exorcise less than 80% of the paranormal phenomena that appear in your appartment and Eileen have to die during final battle.
The 21 Sacraments
You have to exorcise less than 80% of the paranormal phenomena that appear in your appartment and Eileen have to survive during final battle.
Mom
You have to exorcise more than 80% of the paranormal phenomena that appear in your appartment and Eileen have to survive during final battle.
Goodbye
Misc. Unlockables
Beat the game once, save and load the new data. Then, in the Forest World, near the car, search for a cut trunk, the Chainsaw is right beside it.
Chainsaw
Complete the game on any skill level and then restart using the same save. Check room 303 for the costume. It can be selected on the 3rd run through.
Eileen's Nurse Costume
Get 10 big stars in hard mode
One Weapon Mode
Beat One Weapon Mode with a 10 star rank
All Weapons Mode
Finish the game with all four endings on one slot. Start a new game and select Eileen's nurse uniform to have Cynthia wearing her special costume.
Cynthia's Special Costume
Get at least 9 stars in a Brand New Fear fear file in hard mode.
Eileen's Sub-Machine gun
Complete the game on any difficulty, then save the game after the credits.
Brand New Fear Mode
Score a 100 rank in One Weapon Mode
Full Weapon Mode