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
Pass level without traps 3 times
Hide 50 bodies
Kill 15 people with one car
Die 100 times
Kill all robbers in Casino level
Complete level without found body
Complete the game
Lose level with 1 alive person
Kill 50 people by horse
Poison 100 people
Complete level in 3 minutes
Kill 1000 people
Kill 30 people without alarm in one level
Kill 20 people in a row
Complete level with FBI
Escape cop 5 times
Use traps 50 times
Get you ass kicked for dancing
Kill person who runs to call police 20 times
Kill 50 stunned people