Twisted Metal is a series of vehicular combat video games published by Sony Computer Entertainment, and developed by various companies during its tenure. The series began on the PlayStation in 1995 and currently features eight games. It is the 162nd best-selling video game franchise, selling over 7 million copies of Twisted Metal: Black in North America alone, and at least 15 million copies total. It is the longest-running PlayStation-exclusive franchise with a total of seventeen years running from 1995 to present; the second-longest being the Gran Turismo series, which has spanned fourteen years. Seven games of the series (including Twisted Metal: Black Online) were re-released as part of the Sony Greatest Hits program. In concept, Twisted Metal is a demolition derby that permits the usage of ballistic projectiles, machine guns, mines, and other types of weapons (up to and including satellite-based weapons and nuclear weapons).