Here is the full list of unlockable trophies in Dead Rising 2: Off The Record for the PS3.
There are no secret trophies to unlock in this game.
Adult Content (Bronze) – Take an extremely erotic picture
Alpha Vs. Omega (Gold) – Have Denyce attack and damage Sgt Boykin
Award Winning Photography (Gold) – Photograph 75 PP stickers
Best of Friends (Bronze) – Defeat 5 psychopaths in co-op
BFF (Bronze) – Use the Snapshot skill move on a zombie
Camera Crazy (Bronze) – Take a picture of a psychopath
Card Archive (Bronze) – Collect 50 combo cards
Card Collection (Bronze) – Collect 20 combo cards
Challenge Addict (Bronze) – Get at least a bronze medal on 10 different single player challenges
Challenge Domination (Silver) – Get a gold medal on all single player challenges
Cramped Quarters (Bronze) – Get 8 survivors into a vehicle
Dominoes (Bronze) – Use the Jump Kick to knock down 100 zombies
DR2: OTR Trophy Master (Platinum) – Acquire all the trophies in Dead Rising 2: Off The Record
Drugged Up (Bronze) – Take a dose of Zombrex
Elite Killer (Bronze) – Kill 1337 zombies [Host Only]
Even More Help From My Friends (Silver) – Get a gold medal on all co-op challenges
Frank West: Cross Dresser (Bronze) – Dress up completely in women’s clothing
Full Camera (Bronze) – Fill your camera’s memory
Hands of Doom (Bronze) – Unlock all skill moves
Help From My Friends (Bronze) – Get at least a bronze medal on 10 different co-op challenges
I Got a Medal! (Bronze) – Get a medal on a challenge in Sandbox Mode
Luggage Code (Bronze) – Kill 12,345 zombies [Host Only]
Maintaining the City (Bronze) – Visit 10 different maintenance rooms
Making Memories (Bronze) – Take a picture of your co-op partner during co-op play
Mixed Messages (Bronze) – Take a picture with elements of horror, brutality, outtake and erotica in a single shot
More Help From My Friends (Bronze) – Get at least a bronze medal on all co-op challenges
New Hotness (Bronze) – Build one of the combo weapons new to Dead Rising 2: Off The Record
Nice Shot (Bronze) – Photograph a PP sticker
No Zombies in the Vents (Bronze) – Unlock the secret shortcut
Out With the Old (Bronze) – Defeat the motorcycle-riding psychopath [Story Mode Only]
Party Time (Bronze) – Get a survivor drunk
Photo Journalist (Bronze) – Get back in the game by gaining lots of PP from pictures
Photo School (Bronze) – Take a high PP value picture
Photo Album (Silver) – Photograph 25 PP stickers
Powered Up (Bronze) – Restore power to the Yucatan Casino
Prestigious PP (Bronze) – Get over 2,000 PP from a single zombie kill
Prom Night (Bronze) – Kill 69 zombies [Host Only]
Puking Rally (Bronze) – Have a zombie slip in a puddle of vomit
Purewal Memorial Cup (Bronze) – Don’t consume any meat, dairy or alcohol until the military arrives
Raw Emotion (Bronze) – Take a photo of a survivor in a very dramatic situation
Safety Check: Failed (Bronze) – Use the amusement park rides to kill 10 zombies at once
Save the Girl (Bronze) – Rescue a damsel in distress from the Twin Terrors
Save the Girl… Again (Bronze) – Save the damsel in distress a second time
Save the Girl… Yet Again (Bronze) – Save a damsel in distress for the third and final time
Six Digits?!? (Gold) – Kill 100,000 zombies [Host Only]
Team Player (Bronze) – Avert a mutiny
Technological Terror (Bronze) – Destroy a ‘harvester’
The Challenge Experience (Bronze) – Get at least a bronze medal on all single player challenges
Tiger Tamer (Bronze) – Have Snowflake attack and damage a psychopath
True Colors (Bronze) – Defeat the mastermind of the Fortune City incident
We Have a Winner! (Bronze) – Play a carney game and win