Here is the full list of all 43 Propnight achievements.
Survivors - Escape 100 times
Killers - As Clown, cause damage with a Whirl to a total of 40 different Survivors
Killers - As Clown, kill all 4 Survivors during a match
Killers - As Shinigami, use Flashback 40 times
Killers - As Shinigami, kill all 4 Survivors during a match
Killers - As Possum, cause damage with a Sticky Bomb to a total of 40 different Survivors
Survivors - Win as Michelle 10 times
Killers - As Possum, kill all 4 Survivors during a match
Killers - As Maddy, cause damage with a Crush to a total of 40 different Survivors
Killers - Kill Survivor 100 times
Survivors - Win as Aisha 10 times
Survivors - Escape Hypnochair using Lockpick 25 times
Survivors - Win as Jun 10 times
Survivors - Win as Isaac 10 times
Survivors - Use Energy Drink 100 times
Survivors - Win as Kate 10 times
Survivors - Use any healing item 200 times
Killers - As Maddy, kill all 4 Survivors during a match
Survivors - Open chest 300 times
Killers - As Sheet-Man, cause damage with a Hook to a total of 40 different Survivors
Survivors - Win as Chris 10 times
Survivors - Save Survivor from Hypnochair 100 times
Survivors - Slow down Killer using Flare 50 times
Survivors - Win as Mable 10 times
Killers - As Sheet-Man, kill all 4 Survivors during a match
Survivors - Repair Propmachine 100 times
Props - Get 10000 damage while in Prop form
Killers - As Igor, cause damage with a Grenade to a total of 40 different Survivors
Props - Escape Killer by turning into a Prop 100 times
Survivors - Win as Taiga 10 times
Props - Stun Killer with a Prop 100 times
Survivors - Collect 100000 coins
Killers - As Akasha, cause damage with a Blade Dance to a total of 40 different Survivors
Killers - Break Propmachine 100 times
Killers - Cause 40000 of damage
Killers - As Impostor, cause damage using Spy to a total of 40 different Survivors
Killers - As Granny, cause damage with a Knife Throw to a total of 40 different Survivors
Killers - As Banshee, cause damage with a Scream to a total of 40 different Survivors
Killers - As Igor, kill all 4 Survivors during a match
Killers - As Akasha, kill all 4 Survivors during a match
Killers - As Impostor, kill all 4 Survivors during a match
Killers - As Banshee, kill all 4 Survivors during a match
Killers - As Granny, kill all 4 Survivors during a match