based on such factors as traffic levels, availability of electrical power, crime levels, and proximity to other types of buildings—for example, residential areas next to a power plant will seldom appreciate the highest grade of housing. In the SNES version and later, the player can also build rewards when they are given, such as the mayor's mansion or a casino. The player may face disasters including flooding, tornadoes, fires (often from air disasters or shipwrecks), earthquakes and attacks by monsters. In addition, monsters and tornadoes can trigger train crashes by running into passing trains. Scenarios SimCity includes goal-centered, timed scenarios that could be won or lost depending on the performance of the player. The scenarios were an addition suggested by Broderbund to make SimCity more like a game. The original cities were based on real-world cities and attempted to re-create their general layout. While most scenarios either take place in a fictional timeline or have a city under siege by a fictional disaster, a handful of available scenarios are based on actual historical events. Development SimCity was developed by game designer Will Wright. While working on the game Raid on Bungeling Bay, in which the player flies a helicopter dropping bombs on islands, Wright found he enjoyed designing the islands in the level editor rather than playing the actual game. This led him to develop increasingly sophisticated level editors. At the same time, Wright was cultivating a love of the intricacies and theories of urban planning and acknowledges the influence of System Dynamics which was developed by Jay Wright Forrester and whose book on the subject laid the foundations for what would become SimCity. In addition, Wright also was inspired by reading "The Seventh Sally", a short story from The Cyberiad by Stanisław Lem, in which an engineer encounters a deposed tyrant, and creates a miniature city with artificial citizens for the tyrant to oppress. The game reflected Wright's approval of mass transit and disapproval of nuclear power; Maxis president Jeff Braun stated "We're pushing political agendas". The first version of the game was developed for the Commodore 64 in 1985; it was not published for another four years. The original working title of SimCity was Micropolis. The game was unusual in that it could neither be won or lost; as a result, game publishers did not believe it was possible to market and sell such a game successfully. Broderbund