Here is the full list of all 50 Slayaway Camp: Butcher's Cut achievements worth 1,000 gamerscore.
Unlock the gorepack called Cinco de Slayo.
Unlock the gorepack called Party's Over.
Unlock the gorepack called Demonized.
Unlock the gorepack called Charbroiled.
Unlock the gorepack called Face Stapled.
Unlock the gorepack called Puffed Up.
Kill 666 victims across all Slayaway Camp movies.
Complete Slayaway Camp X "Space Camp"
Complete Slayaway Camp 8 "Manhattan Manslaughter"
Unlock the gorepack called Ball'd Faced Lier.
Complete Slayaway Camp 7 "Office Hours".
Kill a victim by scaring them into an electric fence.
Unlock the gorepack called C-flat Face.
Unlock the gorepack called Juiced.
Complete Slayaway Camp 6 "Fatality Ward"
Kill a victim when the lights are off.
Unlock the gorepack called Not the Bees.
Unlock the gorepack called Origami'd.
Complete Slayaway Camp 5 "Bloodbath Beach".
Kill a swat cop.
Complete Slayaway Camp 4 "Slash'em High".
Unlock the gorepack called Pincusioned.
Complete Slayaway Camp 3D "The Abusement Park"
Kill 30 dumb cops across all Slayaway Camp movies.
Get through a level with a cat without killing it.
Unlock one new psycho killer using the Mystery Box.
Unlock the gorepack called Spronged.
Unlock the gorepack called Eef the bonus!
Get a score of 25 in Faces of Killed 3.
Unlock the gorepack called Broken Heart.
Complete Slayaway Camp 2.5 "Another Return to Slayaway Camp".
Kill a victim with a Landmine.
Unlock the gorepack called Pruned.
Unlock the gorepack called Double Blind.
Unlock 13 Gore Packs.
Get a score of 13 in Faces of Killed 3.
Get a score of 20 in Faces of Killed 3.
Get a score of 10 in Faces of Killed 3.
Get a score of 5 in Faces of Killed 3.
Kill 100 victims across all Slayaway Camp movies.
Unlock 13 Killers using the Mystery Box.
Unlock 5 Killers using the Mystery Box.
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.