OpenTTD

OpenTTD is an open-source implementation of the economic simulation game Transport Tycoon Deluxe. The main goal is to manage a transport company that moves passengers and goods by land, sea, and air, generating profit and expanding the infrastructure network.

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• Railway infrastructure. Construction and management of railway tracks, including signals, stations, and depots. The signal system allows for controlling train traffic in complex networks, avoiding collisions and optimizing flow. It is possible to create interchanges, classification yards, and high-capacity lines.
• Road system. Development of road networks for buses and trucks. This includes the placement of bus and truck stations, stops, and depots. Route planning considers traffic density and connectivity with industrial areas and cities.
• Maritime transport. Construction of ports, canals, and locks to operate ships and ferries. Ships transport large volumes of cargo between ports. Water depth and the construction of artificial canals are determining factors for navigation.
• Commercial aviation. Management of airports and air routes for airplanes and helicopters. Airports have different sizes and capacities, limiting the type of aircraft that can operate. Routes connect distant cities and regions.
• Production chain. Connecting primary and secondary industries to transport raw materials and manufactured goods. Industries have production levels that vary according to the efficiency of the transport service. A complete logistics system spans from extraction to delivery to the final consumer.
• Urban growth. Cities expand dynamically in response to the quality of the provided transport service. Efficient transport of passengers and mail accelerates the growth of urban centers, generating higher demand.
• Economic competition. Presence of rival companies controlled by artificial intelligence or network players. Companies compete for resources, routes, and territories. It is possible to acquire competitor companies under certain financial conditions.
• Finance and economy. Detailed accounting system, bank loans, interest rates, and cost fluctuation. Financial reports show the profitability of each vehicle and route. The global economy experiences cycles of recession and boom that affect income.
• Customization via scripts. Integration of AI scripts, new vehicles, graphic sets, and game mechanics through the online content system. Scripts modify game behavior, add objectives, or change economic rules.
• Multiplayer network game. Multiplayer mode with support for dedicated and publicly listed servers. Players can cooperate or compete in the same game. The system includes administrative controls, passwords, and company management.
• Terraforming tools. Modification of the terrain through raising, leveling, excavating, and planting trees. Terraforming has a cost that depends on the extent and type of terrain. It is essential for plotting optimal routes.
• Statistics and graphs. Performance monitoring through income graphs, station ratings, cargo volumes transported, and company rankings. Information windows show detailed data on each game element.
• Advanced configuration. Granular adjustment of game parameters, such as vehicle speeds, construction costs, growth rates, and AI behavior. Each parameter has defined minimum, maximum, and default values.
• Compatibility with original formats. Use of graphic and sound files from the original Transport Tycoon Deluxe to reproduce the classic experience. The game also works with high-resolution replacement graphic and sound sets.
• Programmable signal system. Path signals and pre-signals that allow creating conditional logic for railway traffic control. This system enables the construction of high-density and efficient railway networks.

OpenTTD development began in 2003 as a reverse engineering project of Chris Sawyer's Transport Tycoon Deluxe game. Ludvig Strigeus started the project, rewriting the code from scratch in the C++ language. Over the years, a community of developers has maintained and expanded the project under the GNU General Public License version 2. The source code is hosted in public repositories, receiving contributions from programmers around the world. Stable version 1.0.0 was released in April 2010.

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