Here is the full list of all 40 Until Dawn: Rush of Blood trophies - there are 21 bronze, 16 silver, 2 gold and 1 platinum.
Collect all trophies
Finish the story on Psychotic
Collect all the skittles
Finish 'Final Inferno'
Finish 'Final Inferno' on Insane
Finish the story on any difficulty
See all the 'Moment of sanity' sequences
Finish 'Mines of Death' on Insane
Finish 'Mines of Death'
Finish 'Ghost Town'
Finish 'Ghost Town' on Insane
Have picked up all weapons
Die from spider venom
Kill 20 enemies with barrels
Hit three targets with one shot from the Revolver
Finish 'Psycho Cellblock' on Insane
Finish 'Psycho Cellblock'
Dual wield Revolvers
Dual wield Machine Pistols
Get 100 headshots
Complete a level using only pistols
Blast off 100 limbs
Get killed by a sawblade
Finish 'Hotel Hell'
Finish 'Hotel Hell' on Insane
Beat a previous set score on a level
Complete a level using only one hand
Collect all the skittles in one level
Finish 'Nightmare Descent'
Finish 'Nightmare Descent' on Insane
Get > 80% accuracy on a level
Hit three or more targets with a blast from the shotgun
Die from hitting head on a barrier
Dual wield Shotguns
Finish 'Haunted Lodge'
Finish 'Haunted Lodge' on Insane
Pick up a new weapon
Reach multiplier x8
Shoot all the moving ducks in 'Haunted Lodge'
Reach multiplier x4