Editing OpenTTD (section)

==Gameplay==
{{See also|Transport_Tycoon#Gameplay|l1=Transport Tycoon Gameplay}}
''OpenTTD'' gameplay is very similar to ''Transport Tycoon Deluxe'', on which it is based, although there are many improvements in both options within the game and ease of use.<ref name="dpopov"/><ref>{{cite journal|url=http://dl.fullcirclemagazine.org/issue9_en.pdf |title=Install Open Transport Tycoon Deluxe (OpenTTD) |date=January 2008 |author=McCullagh, Jonny |journal=Ubuntu Full Circle Magazine |pages=20–21 |url-status=live |archive-url=https://web.archive.org/web/20110708182442/http://dl.fullcirclemagazine.org/issue9_en.pdf |archive-date=July 8, 2011 }}</ref> 
A player's aim is to build a transportation network using trucks, buses, trains, airplanes and boats to link together industries and towns on the map and transport the cargo they produce. Every time a vehicle makes a delivery of some cargo, players receive an income, allowing them to build more infrastructure (rails, stations, etc.), build more vehicles, modify the terrain, and interact with towns, via their local authorities. The default game runs from 1950 to 2050, during which a player aims to get as high a performance rating (based on number of vehicles, income, amount of cargo delivered, etc.) as possible.
[[File:OpenTTD industry-commodity flow chart - Temperate.svg|thumb|300px|Chart illustrating flow of commodities between industries and towns in Temperate scenarios in ''OpenTTD''.]]
The world map is dotted with both industries and towns. Cargo for transportation is supplied by both industries (e.g. the coal mine which produces coal) and towns (which produce passengers and mail) and accepted by other industries and/or towns according to their needs (e.g., the power station accepts coal). Placing a station near a source and a receiver of a certain cargo allows transportation between the two. The amount of cargo supplied by a town or industry depends on the quality of transport players provide to move its goods. Payment for delivering cargo depends on the quantity of cargo delivered, how fast it was delivered and how perishable it is. Some cargoes (e.g., passengers) must be delivered faster than others (e.g., coal) to earn a good income.

[[File:OpenTTD difference block path signals.svg|thumb|280px|The introduction of the "Path Signal" to ''OpenTTD'', in addition to the traditional "[[Automatic block signaling|Block Signal]]" from the original ''Transport Tycoon'', increases [[throughput]] of railway junction-crossing.]]
During the course of the game, players must build and expand their transport infrastructure. The only infrastructure present on the map at the start of the game are roads within towns (as well as seas and rivers which ships can utilise). All other infrastructure—ports, stations, airports, rail, canals, locks, aqueducts and depots—must be built by players. The tools for building a rail network are particularly powerful, and players have access to many different signal types to build a complex and interconnected rail network.

Technology improvements give players access to newer, faster and more powerful vehicles. For rail transport, new track technology also becomes available over time, first [[Railway electrification system|electrified rail]], then [[monorail]] and [[maglev]] track. In general, newer vehicles cost more money to buy and run, and players must have earned enough money in earlier stages of the game to be able to afford to upgrade their vehicles. The full course of the default game, from 1950 to 2050, takes around 24 hours.<ref>
{{cite web
 |title=Game speed is too fast 
 |work=Transport Tycoon Forums 
 |url=http://www.tt-forums.net/viewtopic.php?p=574774#p574774 
 |access-date=2009-12-11 
 |url-status=live 
 |archive-url=https://web.archive.org/web/20110927111002/http://www.tt-forums.net/viewtopic.php?p=574774 
 |archive-date=September 27, 2011 
}}
</ref> Players can optionally start at earlier or later dates and play on past 2050, although no new technology becomes available.

''OpenTTD'' can be played by one player, against a computer controlled AI, or by many players against each other, over a LAN or the Internet.

===Multiplayer===
''OpenTTD'' supports multiplayer games for up to 255 players between 15 different transport companies, and can be played both over a LAN or over the Internet. Each transport company is in competition with each other transport company, and each transport company can be controlled by more than one player at any time. This allows both co-operative and competitive multiplayer games. Competitive team games (e.g. two transport companies, each controlled by three players) are also possible.

===Modding===
The game is also home to an active modding community, with community-made additions including new vehicles, trains and scenarios.<ref>{{cite web |last1=Bolding |first1=Jonathan |title=Transport management classic OpenTTD is coming to Steam |url=https://www.pcgamer.com/transport-management-classic-openttd-is-coming-to-steam/ |website=PC Gamer |date=7 February 2021}}</ref> Additional changes to the open source code which modify core game mechanics ("patches") are also available.<ref>{{cite web|title=OPenTTD{{!}}Patches|url=https://wiki.openttd.org/en/Community/Patches/Patches|accessdate=13 February 2021}}</ref><!--IAR about citing a wiki for this one specific example, since anyway it's just completing information which is given in the secondary source-->