Mahjong is a competitive game for four players. A three-person variant originating from Korea exists as well as a two-player variant often seen in arcade games. Each player is dealt a hand of 13 tiles, and the goal is to create a complete hand, either from collecting four of a similar tile or by building a whole suit, before the other players. How the players draw and discard tiles and the point values of a hand depend on regional rules.
Most games called Mahjong in the west are based on the game Shanghai, or what is generically known as Mahjong Solitaire. This is a radically different game than the Asian staple. However, video games based on both versions have been released in both areas.