Share The Pain is the way to go for cheap thrills and some lazy day fun.
I revisited my now 4+ year old Postal 2: Share The Pain game recently, and after a quick install, adding one patch, I was up and running again like old times. Today's resolutions serve the game well and the Unreal engine is passable to this day. And I enjoy it now more than I did then as a result, now that it can run smoothly and quickly at the highest settings.
I love playing a derelict jerk who lives in a trailor with his nag for a wife, where the entire game revolves around what should be daily tasks such as cashing a check, picking up milk, or returning a book. But nothing is as it appears in this world. Various religious and environmental protest groups constantly get in your way with their rioting and destruction. Blatantly politically incorrect "terrorists" in middle eastern clothing will eventually become your enemy on-sight. Shoot someone in public, defending yourself or not, and the cops come running, until a "GTA" style police alarm meter goes down to nothing. Certain citizens will pull heat on you and you have no choice but to run or kill them. Need to muffle that shotgun blast so as not to draw too much outside attention? Put a cat on the end. Throw mazeltov cocktails and light up the joint, and watch bodies slowly fry to a crisp while they crawl around with charred bodies. Knock-off heads with your shovel or blow heads clean off up close with your shotgun. Use your realistic sniper rifle from a distance or Napalm gun to splash a burning mess in front of you, and watch the burning bodies scatter in terror. Pee on someone, and watch them vomit, or watch randomn citizens vomit at the sight of mutilated or dead bodies in the street. Walk around with your member out, and see what happens as well.
The zone load times are fairly regular but not overly annoying, and on today's machines should be very quick, but there are quite a few. The AI is actually decent and enemies will duck and cover or hide behind objects. Rest assured the game is not nearly as satisfying without the difficulty being set to at least "aggressive."
I enjoy the single player game and completing the missions, believe it or not, as you do get a sense of accomplishment from completing tasks, which can be done in variety of ways - usually revolving around how you clear a path and get out. Lay down a path of gasoline then fry the entire building when the cops come running in? Or shoot your way out? Or in some cases play it stealthy or simply pay for what you're picking up and leave if you choose...but you'll miss out on lots of weapons and loot if you don't explore.
The game gets progressively tougher as you make more enemies in public, and the street cops become military personnel as the town increasingly becomes concerned about a raving lunatic killer (you) they can't seem to catch. So finishing the game on a decent difficulty setting can be rewarding and satisfying.
Add "Apocolypse Weekend" for a weekend expansion to Postal 2, or take part in the multiplayer mode (thus "Share The Pain") which is a Capture The Flag type of game that has you capturing the other team's postal babe and bringing her back to your base, and uniting her with your postal babe, then watch the girl-on-girl fun.