Ghostbusters is a licensed game by Activision based on the film of the same name. It was designed by David Crane and released for several home computer platforms in 1984, and later for video game console systems, including the Atari 2600, Master System and Nintendo Entertainment System. The primary target was the Commodore 64 and the programmer for the initial version of the game was Adam Bellin. All versions of the game were released in the USA except for the Amstrad CPC and ZX Spectrum versions, which were released only in Europe, and the MSX version, which was released only in Europe, South America, and Japan. In 1984, after the film Ghostbusters had been launched, John Dolgen VP of Business Development at Columbia Pictures approached Gregory Fischbach (President of Activision International and subsequently CEO and Co-founder of Acclaim Entertainment) and offered to license the game rights to Activision without specific rules or requests for the design or content of the game, only stipulating that it was to be finished as quickly as possible in order to be released while the movie was at peak popularity. Activision was forced to complete the programming work in only six weeks in contrast to their usual several months of development time for a game. Activision had at the time a rough concept for a driving/maze game to be called "Car Wars", and it was decided to build the Ghostbusters game from it. Both the movie and the game proved to be huge successes with the game selling over two million copies by 1989. Gameplay The player sets up a Ghostbusters franchise in a city whose psychokinetic (PK) energy levels have begun to rise. At the start of the game, the player is given a set amount of money and must use it to buy a vehicle and equipment for detecting/catching ghosts. They must then move through a grid representing the city, with flashing red blocks indicating sites of ghost activity. When the player moves to a flashing block, the game shifts to an overhead street view and they must drive to the site, attempting to vacuum up stray ghosts if the vehicle is equipped to do so. Upon reaching the site, the player must maneuver two Ghostbusters to guide a Slimer ghost into position to be drawn into a trap. Successfully doing so awards money, but each failure causes the PK energy level to