SimTower: The Vertical Empire is a construction and management simulation video game developed by OpenBook Co., Ltd. and published by Maxis for the Microsoft Windows and Macintosh System 7 operating systems in November 1994. The game allows players to build and manage a tower and decide what facilities to place in it, in order to ultimately build a five-star tower. Random events take place during play, such as terrorist acts that the player must respond to immediately.
SimTower allows the player to build and manage the operations of a modern, multi-use skyscraper. They must plan where to place facilities in the tower that include restaurants, condominiums, offices, hotel rooms, retail stores and elevators. To prevent tenants from vacating their properties, the player must keep their stress low by fulfilling their demands for medical centers, parking lots, recycling facilities, clean hotel rooms with the help of housekeepers, and an efficient transportation system, which involves managing elevator traffic. SimTower, which was built around an elevator simulation program, places a strong emphasis on good elevator management.
The game begins with a one-star tower with limited building options. To increase the tower’s star rating, it must attract more tenants by providing more living space (or office space, and later in the game, hotel and various commercial space). New facilities are made available while the tower progresses from a one-star rating to a five-star rating. The highest achievable rating is the designation of “Tower” which can only be awarded by building a cathedral at the very top of a five-star building with all possible tower levels above ground developed. The tower is limited to a maximum of 100 floors above ground and nine stories below ground. Standard elevators, which can span a maximum of 30 floors, and express elevators, which can span the entire height of the building, must be used efficiently to decrease tenant stress.
Certain events can take place while managing the tower. For example, terrorists may phone the player to let them know that they have hidden a bomb in the building, and that they demand a ransom. If the ransom is not paid, then security services must find the bomb before it detonates, or else the tower will incur significant damages. If the player builds facilities underground, the game may notify them that their workers have discovered gold treasure, which gives the player a significant amount of funds. At random intervals during the game, there are notifications that state that a VIP will be visiting the tower soon, so the player must prepare for their visit. If the VIP enjoys their visit because of variables such as a comfortable hotel suite and efficient navigation, the VIP will give the tower a favorable rating. A favorable rating would then allow the tower to advance to the next star level, assuming the other qualifications are met. Although it does not have any impact on the tower, at the end of the fourth quarter every year in the game, Santa Claus and his reindeer fly across the tower.
Source: SimTower Wiki