Here is the full list of all 21 Party Hard trophies - there are 21 bronze. It takes around 8-10 hours to unlock all of the trophies on PlayStation 4.
Play Party Hard 100 times
Complete level with FBI
Escape cop 5 times
Complete the game
Die 100 times
Complete level without found body
Pass level without traps 3 times
Kill 15 people with one car
Kill all robbers in Casino level
Hide 50 bodies
Lose level with 1 alive person
Kill person who runs to call police 20 times
Kill 50 people by horse
Kill 1000 people
Complete level in 3 minutes
Get you ass kicked for dancing
Poison 100 people
Kill 50 stunned people
Use traps 50 times
Kill 30 people without alarm in one level
Kill 20 people in a row