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