First, complete the game with the Dog ending. Start a new game, then set the button config to type two in the options menu. The button combination needs to be input during normal play, immediately after exiting the inventory menu (i.e. while the screen is fading to black after exiting). While holding the Start button, hold L2, Square and L3 in that order. While holding these buttons down, tapping L3 will toggle different views on the mini map. Tapping L3 enough times will eventually switch the mini map off.
Additional riddle difficulty
Successfully complete the game under the easy, normal, and hard riddle difficulty settings. Select the hard riddle difficulty again and begin a new game with a new combination of riddles.
Book Of Lost Memories
Successfully complete the game. Start a new game and look for the newspaper stand near the Texxon Gas Station. The Book Of Lost Memories can be found inside.
Book Of The Crimson Ceremony
This book can be found in the reading room on the second floor of the "Nightmare" hotel.
Chain Saw
Successfully complete the game under the normal difficulty and normal riddle difficulty settings. Start a new game to find the Chain Saw among logs before the cemetery.
Completion bonuses
Successfully complete the game. Start another game and enter the extra options menu to access new features.
A "Bullet Adjust" option can be set, allowing the normal amount of ammunition found at a location to be doubled or tripled. A "Noise Effect" option can be toggled. Another new option can be toggled, allowing scenes to be viewed without distortion.
Dog Tag
Successfully complete the game with the "Rebirth" ending. Start a new game and a dog house will now appear near Jack's Inn. Look inside the dog house to find the Dog Tag.
Extra Options
At the Options screen, press L1 + R1.
Hyper Spray
Successfully complete the game two times. Start a new game to find the Hyper Spray on the south side of the motor home.
In-game reset
Press L1 + L2 + R1 + R2 + Select + Start during game play.
Introduction FMV sequence audio
If you wait at the title screen for awhile, the introduction FMV sequence will begin. In some scenes, there will be no audio. Successfully complete the game one time and the audio will be restored to those scenes.
Obsidian Goblet
Successfully complete the game. Start a new game and enter the Historical Society building. The Obsidian Goblet can be found on a shelf.
Reveal signs
Unlock all five endings, then start a new game. All signs will now be revealed.
White Chrism
Successfully complete the game. Start a new game to find White Chrism vial in the kitchen of apartment 105 in Blue Creek Apartments.