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