Postal 2 (stylized as PostalĀ²) is a first-person shooter video game by Running with Scissors, and it is the sequel to the 1998 game Postal. Both are unintentionally highly controversial due to high levels of violence and stereotyping.
http://www.gamespot.com/postal-2/My input:
Oh my god how could I not mention this one
probably the most memorable game I ever played. Funny story, funny gameplay. Lots of swearing, pissing on people, racial stuff, using cats as silencers, and of course, The Crotchy.
The game itself wasn't long and that made me sad. But it has few extensions which are just as great
There is even a movie about it which was also funny xD
Here is an episode:
http://www.youtube.com/watch?v=SE0fhflzoHM