It is indeed Postal 2, the game that also lets you (in no particular order)

• Use cats as silencers.
• Throw anthrax-infected cow heads as weapons.
• Put out fires, including yourself if you're on fire, by pissing on them.
• Allows you to "lose" a sledgehammer in a cow.
• Lets you murder Gary Coleman (years before he actually died)
• Has a in-series children's toy called Bad Touch Krotchy
• Has a mascot for said toy that is immune to bullets.
• Allows you to lure cops with donuts.
• Allows you to lure cops with donuts that you pissed on, causing them to vomit once they realised what was wrong with it.
• Has in-game arcade games called Sym Homeless and Bastard Fish. Sadly, not playable.
• Has you kidnapped by hillbillies at one point and dressed in a gimp suit.
• Has a sewer complex that leads directly to Tora Bora.

and don't forget the most epic quests like "Get milk","Visit your father's grave" and "Go to work"