Kingpin exists solely to provide a game with vulgar language and to advertise for a moderately successful band.
If you're a Cypress Hill fan, read no further. The cover of the game boasts about its connection with the band Cypress Hill, and said bands contributions to the games sound track. Rather than play hits like "insane in the brain" we get some cutting-room floor level music that is mostly forgettable.
Regardless of how people felt about the timing of the games release (just days after the incident at Columbine High School), it is a mostly offensive game for most people. You can even interact with other characters in the game, telling them where they can go, how they can get there, and how you're going to make that happen. Rather a pointless addition to any good game, but, necessary for this game, because that is solely why it exists. To provide a video game with bad words so the kids will buy it to be cool. The novelty that is the language in this game wears off in about an hour.
As for the game itself: I found it hard. I spent days upon days just trying to figure out how to get a gun, and make something happen other than cuss someone out, or kill hookers.
In summary, if you're looking for a good first person shooter, look elsewhere. If you are a Cypress Hill fan, or a fan of pointless cussing, or a fan of killing hookers, this is the game for you!