Young Guns was a failed video game which was going to be for the super nintendo with great graphics and is very rare to find and follow's the plot of the first movie and it ended with Billy The Kid riding away shooting at the sky with a revolver after killing murphy.
Young Guns II was also failed and it was released just like the first game but wasnt promoted and the second game follows the plot of the film of the same name.
a playstation 2 version was made with both movies put into one and had not recieved many reviews due to it not being that much of famous game.