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
Die from spider venom
Kill 20 enemies with barrels
Complete a level using only pistols
Get killed by a sawblade
Die from hitting head on a barrier
Collect all the skittles
Finish the story on Psychotic
Finish the story on any difficulty
Finish 'Final Inferno' on Insane
Finish 'Final Inferno'
Finish 'Mines of Death'
Finish 'Mines of Death' on Insane
See all the 'Moment of sanity' sequences
Finish 'Ghost Town'
Finish 'Ghost Town' on Insane
Have picked up all weapons
Finish 'Psycho Cellblock' on Insane
Finish 'Psycho Cellblock'
Dual wield Machine Pistols
Hit three targets with one shot from the Revolver
Dual wield Revolvers
Get 100 headshots
Finish 'Hotel Hell'
Finish 'Hotel Hell' on Insane
Blast off 100 limbs
Finish 'Nightmare Descent'
Finish 'Nightmare Descent' on Insane
Complete a level using only one hand
Hit three or more targets with a blast from the shotgun
Dual wield Shotguns
Collect all the skittles in one level
Reach multiplier x8
Get > 80% accuracy on a level
Shoot all the moving ducks in 'Haunted Lodge'
Beat a previous set score on a level
Finish 'Haunted Lodge'
Finish 'Haunted Lodge' on Insane
Pick up a new weapon
Reach multiplier x4