Here is the full list of all 51 Slayaway Camp: Butcher's Cut trophies - there are 38 bronze, 10 silver, 2 gold and 1 platinum.
Collect all trophies to unlock the platinum trophy.
Unlock 13 Killers using the Mystery Box.
Unlock the gorepack called Charbroiled.
Get a score of 25 in Faces of Killed 3.
Unlock the gorepack called Puffed Up.
Unlock the gorepack called Party's Over.
Unlock the gorepack called Demonized.
Unlock the gorepack called Grenade!.
Kill 666 victims across all Slayaway Camp movies.
Unlock 5 Killers using the Mystery Box.
Unlock the gorepack called Broken Heart.
Unlock the gorepack called Face Stapled.
Unlock the gorepack called Cinco de Slayo.
Unlock the gorepack called Spronged.
Complete Slayaway Camp X "Space Camp".
Unlock the gorepack called Juiced.
Complete Slayaway Camp 8 "Manhattan Manslaughter".
Unlock the gorepack called Pincusioned.
Complete Slayaway Camp 7 "Office Hours".
Kill a victim by scaring them into an electric fence.
Complete Slayaway Camp 6 "Fatality Ward".
Unlock the gorepack called Origami'd.
Unlock the gorepack called Double Blind.
Unlock the gorepack called Ball'd Faced Lier.
Unlock the gorepack called C-flat Face.
Kill a victim when the lights are off.
Complete Slayaway Camp 5 "Bloodbath Beach".
Kill a swat cop.
Kill 30 dumb cops across all Slayaway Camp movies.
Unlock one new psycho killer using the Mystery Box.
Complete Slayaway Camp 4 "Slash'em High".
Get a score of 20 in Faces of Killed 3.
Get a score of 13 in Faces of Killed 3.
Get a score of 5 in Faces of Killed 3.
Get a score of 10 in Faces of Killed 3.
Unlock the gorepack called Pruned.
Complete Slayaway Camp 3D "The Abusement Park".
Kill 100 victims across all Slayaway Camp movies.
Get through a level with a cat without killing it.
Kill a victim with a Landmine.
Unlock 13 Gore Packs.
Unlock the gorepack called Not the Bees.
Complete Slayaway Camp 2.5 "Another Return to Slayaway Camp".
Kill a victim by knocking over a fridge onto them.
Complete Slayaway Camp 2 "Return to Slayaway Camp".
Kill a victim by scarin them into water.
Kill a dumb cop.
Unlock 1 Gore Pack.
Complete Slayaway Camp.
Kill a victim by scaring them into a hole.
Kill a victim by scaring them into a fire.