Mortal Kombat 4 (known in Japan as モータルコンバット4) is a fighting game released by Midway Games in 1997 as the fourth installment of the popular Mortal Kombat series. It is the first game in the series to use 3D computer graphics and the last game in the series to be released for the Nintendo 64. The game features a new 3D engine, new characters, and a new weapon-based fighting system. The game also features a single-player story mode, as well as a two-player versus mode. Mortal Kombat 4 features a new 3D engine, which allowed for more detailed graphics and faster gameplay. The game also features a new weapon-based fighting system, allowing players to equip their characters with various weapons to use during battle. The game also features a single-player story mode, which follows the events of the previous Mortal Kombat games. In the story mode, players must fight their way through a series of opponents in order to reach the final boss. Mortal Kombat 4 also features a two-player versus mode, in which players can battle against each other in a variety of different arenas. The game also features a number of unlockable characters, which can be unlocked by completing certain tasks in the game. Mortal Kombat 4 was a commercial success, selling over 3 million copies worldwide. It was praised for its improved graphics and gameplay, and for its single-player story mode. It was also criticized for its lack of content and for its lack of innovation. Despite this, it is still considered to be one of the best fighting games on the Nintendo 64.