This game is a masterpiece which surpassed any expectections at the time by a mile. I never finished it because I borrowed from a friend, but I will never forget how well the Wild West is represented in this game. Add everything about the story and the deep conversations with an incredible soundtrack and the cinematic camera work and you are in for one of the best games you will ever play.
This, and RDR 2, are the most realistic open world set ups ever made.