There are 58 Trophies that can be collected.

BRONZE

Creator
Create a character

Consumer
Make a purchase in Howard's shop

Light Napper
Complete Zone 1

Deep Sleeper
Reach Zone 50

Comatose
Reach Zone 100

Novice
Level up to LVL 2

Apprentice
Level up to LVL 25

Master
Level up to LVL 50

Choice Meat
Defeat 25 Butchers with the Great Cleaver

Disorderly Conduct
Defeat 25 Nurses with the Steel Pipe

Hammer Time
Defeat 25 Bogeyman with the Bogeyman's Hammer

Pyramid Scheme
Defeat 25 Pyramid Heads with the Great Knife

Light Heal Me
Use Heal Me Karma Ability to restore 25% or more health

Light Heal You
Use Heal You Karma Ability to 50% or more health to a friend (multiplayer)

Light Heal Us
Use Heal Us Karma Ability to restore 50% or more health each to 3 players (multiplayer)

Blood Barrage
Use Blood Barrage Karma Ability to kill 5 or more enemies

Blood Beam
Use Blood Beam Karma Ability on 5 or more enemies at once

Blood Burn
Use Blood Burn Karma Ability to damage 4 different enemy types at once

Power Breaker
Use Weapon Breaker Power Move with a weapon that's about to shatter

Power Charger
Use Charge Tackle Power Move to knock one enemy into another

Power Flasher
Use Flash Burst Power Move to kill 5 or more stunned enemies in a row

Power Inverter
Use Karma Flip Power Move to flip 8 or more enemies at once

Power Repeller
Use Push Force Power Move to knock 8 or more enemies back at once

Power Savior
Use Health Siphon Power Move to bring a dying friend back to life (multiplayer)

Power Switcher
Use 360 Attack Power Move to strike 4 or more enemies at once

Beast Master
Defeat any Guardian without taking damage

Beat Maniac
Earn a 30 or greater timed hit combo

Blacksmith
Level up 10 different weapons

Bleeder
Lose more than 400% health in one Zone without dying

Bouncer
Complete a Zone using only your fists (multiplayer)

Brainiac
Complete any 5 puzzles without using the hint lever

Executioner
Perform a timed execution on 10 enemies in one Zone

Klutz
Trigger every kind of trap in the game

Medic
Drop a health pack after a friend requests one (multiplayer)

Moneybags
Spend over 250,000 MR in Howard's shop

Ninja
Complete a Zone without turning on your flashlight

Sugar High
Complete a Zone without stopping for more than 30 seconds total

Tommfoolery
Perform every in-game VO clip for one character

Wingman
Defeat any Guardian with all four players still alive (multiplayer)

Saint
Achieve the LIGHT ending in every Forsaken Room

Sinner
Achieve the BLOOD ending in every Forsaken Room

Agnostic
Achieve the NEUTRAL ending in every Forsaken Room

Fireman
Defeat the Fire Guardian

Lumberjack
Defeat the Wood Guardian

Sandman
Defeat the Light Guardian

Plumber
Defeat the Water Guardian

Miner
Defeat the Earth Guardian

Phlebotomist
Defeat the Blood Guardian

SILVER

Emissary
Complete Valtiel's missions in Zones 1 through 21

Storyteller
Achieve all 6 of the game's endings

Architect
Complete your Rooms Checklist 100%

Antiquarian
Complete your Artifacts Checklist 100%

Arms Dealer
Complete your Weapons Checklist 100%

Couch Potato
Complete your Broadcasts Checklist 100%

Librarian
Complete your Notes Checklist 100%

Veterinarian
Complete your Bestiary Checklist 100%

GOLD

Author
Defeat the Steel Guardian and complete the game

PLATINUM

Hyperthymesiac
Earn every trophy in the game

http://www.ps3trophies.com/forums/playstation-trophy-news/23963-silent-hill-book-memories-trophy-list.html