So, I just finished my very first playthrough of Postal 2 in it's entirety (Including DLC) and I need to say if you are someone who gets offended easily, do not give this game a go. But if you're someone who can take a joke, this game will soon become one of your favorites.
First off, you have the first 5 days which are packed full of things to do outside of what you're required to do for that day, with each day passing you unlock a new section of the map to explore and trust me, there are a lot of hidden areas chock full of items to help you along the way and a slew of baddies to face.
Then you move onto Apocalypse Weekend, if you choose "A week in Paradise" you'll automatically play these two extra days (Saturday and Sunday), if not then just complete the regular game and pick this adventure afterwards (It should be available in the list of game modes as "Apocalypse Weekend"), you start off where Dude left off after the 5 days had been completed but with a twist, the apocalypse has brought itself to Paradise to end anyone and everything with a beating heart in your home town, and you only have one job, getting out of dodge as fast as humanly possible with your best friend Champ.
That about sums up what Postal 2 is, again if you aren't someone who is keen to offensive jokes and having the game poke at religious views, celebrities, political figures or any other aspect of a touchy society then please stay away from this game, and I strongly advise children not to play this either as it does have some NSFW images in game that could leave one......... curious, but nevertheless if you're looking for an FPS to take you on a trip into a world filled with crazy things to do, I strongly recommend giving this amazing title a shot, you won't regret it, and neither will the Dude.