Ghostbusters is a licensed game produced by Activision based on the movie of the same name. It was designed by David Crane, produced by Brad Fregger, and released for several home computer platforms in 1984, and later released for various video game console systems, including the Atari 2600, Sega Master System and NES.
Most versions of the game had a similar basic format to the initial Commodore 64 and Atari 800 game, which was written in eight months and later ported to the Spectrum and Amstrad CPC. The game was made in such a short time by incorporating portions of a game named "Car Wars" that was already in production. The game was in production concurrently to the movie. The last week of development was spent on the opening screen which plays the Ghostbusters theme. The player must stock up on equipment and make money to complete their objectives. Upon completion of the Commodore 64, ZX Spectrum, Atari 8-bit and Amstrad CPC versions of the game, a code was provided that allowed the player to start a new game with the amount of money accumulated by the end of the previous game. This allowed accelerated progression in the new game. The game varied in some respects depending upon which platform it was played; the Sega Master System version (1987) added an on-foot shooting gallery level with different animations, while the NES version (1988) had a different ending but lower resolution graphics. Despite the fact that the NES game had a new ending, many criticized it because of its several spelling mistakes and errors (because the game was ported by a Japanese developer).