Gun

Gun is a 2005 Western-themed action-adventure video game developed by Neversoft and published by Activision for the PlayStation 2, Xbox, GameCube, Windows, and Xbox 360 as a launch title. The PlayStation Portable (PSP) version was released a year later under the title Gun: Showdown, this version features new side-missions, a multiplayer mode, and other additions that were not available in the console versions. The Xbox version had online support through the "Live Aware" feature. Gun is now supported on Insignia, a revival server for original Xbox games. During its first month, the game sold 225,000 copies across the four console systems for which it was initially released.