From small businesses to transport empire
OpenTTD, based on the commercial business simulation game Transport Tycoon Deluxe, invites you to create a transport empire on land, on water, and in the air.
Computer-based economic and transport simulation games comprising a well thought out abstraction of reality and a sufficiently sophisticated and diverse use concept can easily become addictive. And, in combination with attractive, highly detailed, but not overloaded graphics, such games can become cult classics.
SimCity  has lost none of its attraction since it was first published more than 20 years ago and is viewed as the starting point of an entire genre (see Table 1 for an overview). The original SimCity source code also served as the basis for Micropolis , which is used on the One Laptop Per Child computer.
These games differ not only in terms of visual presentation – top view, isometric view, or 3D model rotatable in all directions with various zoom levels – but in terms of their subject matter and tasks for the player. Whereas SimCity, Mobility, Lincity/Lincity NG, and Micropolis map complex urban processes with development plans, including infrastructural aspects such as electricity and water, the other programs focus exclusively on building and the profit-oriented operation of a transportation network, including route and cargo planning – a challenging task, especially with very large playing areas and in multiplayer mode.
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