Bought it for $5. It's fun, I just wish there was a few RPG elements to make it worth my time to do sidequests.
I was a little shocked when I came to the first mission. I told the three guys I met up with I would go alone, thinking that since there was only seven targets to kill I could accomplish the mission easily. So I got there, and they kicked my teeth in.
I kept reloading my last save until I managed to do it.