Gun is a free roaming western themed experience. The story is a little cliche (you play as another tough guy trying to discover his past) and a lot of the gameplay ideas are somewhat old but the overall experience is actually a lot of fun. The easiest way to describe the game would be GTA3 set in the old west. You need to do several missions in order to progress the story. However, you can also do a lot of side missions if you are interested in boosting your stats, getting money, or just having fun.
I don’t have too much more to say about this game, it was just a fun game to play.