An alright game...
Gameplay- The gameplay is pretty good. At first, there seems like a lot to explore, but eventually you'll know everything and then you'll get bored of exploring and finding your way to things. Killing people can also be fun at first, but eventually it'll get old and you'll get sick of it. Killing enough people will result in a 'Showdown', in which the townspeople turn against you for a little bit, until you kill them all.
Missions- The missions in this game are pretty much the same everytime you start a new one. Kill these few guys, protect this, and ride to there. The missions tend to just seem to repeat themselves, as just killing people. The storyline for the missions are alright, but when you beat the game, it feels real unfinished, as in you wanting more. They aren't as creative as they could have been, and they were all almost too easy for a Mature game.
Graphics- The graphics in all versions are really nice. It's easy to tell what's what and where everything is. The map is helpful too. It's not too hard to find your way around.
Overall, Gun is an ok game, for those of you that like the wild west.