Here is the full list of all 35 Postal III achievements.
Make Venezuela peacemakers go home.
150 kills using fire.
Respawn 20 times.
Kill 1000 unarmed bystanders.
50 kills using cat.
50 kills using bees.
Piss 100 gallons of urine.
Smash 50 windows.
Spend 900 seconds or more in catnip bullet time.
Taze 200 victims.
Destroy 50 cars.
Beat the game once. No restrictions apply. Everyone's a winner.
Finish your business with Krotchy.
200 kills using M-60.
100 kills using machete in melee.
Escape from prison.
50 kills using boomerang machete.
300 headshot/decap kills.
Suck up 500 items with the shop vac.
Return Thegways to the owner
50 badgersaw kills.
Take out all the criminal scum infesting Catharsis!
Arrest eco zealots leader.
Arrest 200 perps.
Choose path for the first time.
Disobey orders, given to you, and see what happens.
Injure yourself.
Kill/incapacitate 235 terrorists.
Beat game with zero kills.n(zombies and bosses don't count)
Kill no animals in one playthrough.
Complete game using only melee.
Complete game using only the pistol.
Complete Good path without falling off.
Euthanise 30 elderly folks.
Complete game killing only males.