Editing OpenTTD

{{Short description|Open-source business simulation game}}
{{Use mdy dates|date=September 2017}}
{{Italic title}}
{{Infobox software
| collapsible = 
| title = OpenTTD
| name = OpenTTD
| logo = Openttdlogo.svg
| screenshot = OpenTTD-1.11.0-nl.png
| caption = Title screen from version 1.11.0 with the ''OpenGFX'' graphics set
| platform = {{ubl|[[Microsoft Windows]]|[[macOS]]|[[Android (operating system)|Android]]|[[Solaris (operating system)|Solaris]]|[[FreeBSD]]|[[Linux]]|[[OS/2]]||[[Haiku (operating system)|Haiku]]}}
| released = 0.1 / {{Start date and age|2004|03|06|df=yes}}<ref name="OpenTTD_0.1">{{cite web |url=https://www.tt-forums.net/viewtopic.php?t=6559 |title=I proudly present to you OpenTTD! |author=orudge |date=2004-03-06 |website=Transport Tycoon Forums |access-date=2021-05-05}}</ref>
| latest release version = {{wikidata|property|preferred|references|edit|Q725120|P348|P548=Q2804309}}
| latest release date = {{wikidata|qualifier|preferred|single|Q725120|P348|P548=Q2804309|P577}}
<!-- not needed now: | latest preview version = 12.0-RC1
| latest preview date    = {{Start date and age|2021|09|25|df=yes}}<ref name="Blog: OpenTTD-12.0-RC1">{{cite web |url=https://www.openttd.org/news/2023/04/10/openttd-13-1 |title=OpenTTD 13.1 |date=2023-04-10 |access-date=2023-04-11}}</ref> -->| programming language = [[C (programming language)|C]], [[C++]], [[Objective-C]], [[Squirrel (programming language)|Squirrel]]<ref>{{cite web|url = https://github.com/OpenTTD/OpenTTD |title = GitHub repository |website = [[GitHub]] |access-date = 5 September 2021}}</ref>
| genre = [[Business simulation game]]
| author = [[Ludvig Strigeus]]
| developer = OpenTTD Team
| license = [[GNU General Public License|GPL-2-0-only]]<ref>[https://github.com/OpenTTD/OpenTTD/blob/master/COPYING.md copying] on github.com</ref>
| website = {{official URL}}
| repo = 
}}

'''''OpenTTD''''' is a [[business simulation game]] in which players try to earn money by transporting passengers, minerals and goods via road, rail, water and air. It is an [[open-source software|open-source]]<ref>{{cite web
| title      = About OpenTTD 
| work       = Official OpenTTD website
| url        = http://www.openttd.org/about
| access-date = 2009-12-11
}}</ref> [[Video game remake|remake]] and expansion of the 1995 [[Chris Sawyer]] video game ''[[Transport Tycoon#Transport Tycoon Deluxe|Transport Tycoon Deluxe]]''.

''OpenTTD'' duplicates most features of ''Transport Tycoon Deluxe'' and has many additions, including a range of map sizes, support for many languages, custom (user-made) [[artificial intelligence]] (AI), downloadable customisations, [[Porting|ports]] for several widely used [[operating system]]s, and a more user-friendly interface.<ref>
{{cite web
 |title=OpenTTD 0.7.4 
 |work=[[Heinz Heise|Heise]] Software Verzeichnis 
 |url=http://www.heise.de/software/download/openttd/52483 
 |access-date=2009-12-11 
 |url-status=live 
 |archive-url=https://web.archive.org/web/20091228003339/http://www.heise.de/software/download/openttd/52483 
 |archive-date=December 28, 2009 
}}
</ref><ref name="dpopov">{{cite journal
 |author       = Dmitri Popov
 |date         = June 2006
 |title        = OpenTTD – Open source hauls the classic Transport Tycoon Delux game into the future.
 |journal      = TUX Magazine
 |pages        = 44–46
 |url          = http://www.tuxmagazine.com/pub/tux/tux014.pdf
 |access-date  = October 11, 2021
 |archive-date = March 14, 2023
 |archive-url  = https://web.archive.org/web/20230314173936/http://www.tuxmagazine.com/pub/tux/tux014.pdf
 |url-status   = dead
}}</ref> ''OpenTTD'' also supports [[local area network]] (LAN) and Internet [[Multiplayer video game|multiplayer]], co-operative and competitive, for up to 255 players.

''OpenTTD'' is [[free and open-source software]] licensed under the [[GNU General Public License|GNU GPL-2-0-only]]<ref>{{cite web |title=OpenTTD |url=http://www.openttd.org/about |access-date=October 13, 2018 |website=OpenTTD}}</ref> and is under ongoing development. According to a study of the 61,154 open-source projects on [[SourceForge]] in the period between 1999 and 2005, ''OpenTTD'' ranked as the 8th most active open-source project to receive patches and contributions.<ref>
{{cite book
 |author1=Belenzon, Sharon 
 |author2=Schankerman, Mark A. 
 |name-list-style=amp 
 |date=October 2008 
 |title=Motivation and Sorting in Open Source Software Innovation 
 |publisher=EDS Innovation Research Programme, London School of Economics and Political Science 
 |url=http://eprints.lse.ac.uk/25476/1/Motivation_and_Sorting_in_Open_Source_Software_Innovation.pdf 
 |url-status=live 
 |quote=Position 8th, Name OpenTTD, Topic Simulation, License GNU GPL, License Type Highly Restrictive, Age 2, # Developers 11, # Patches received 874, # Patches Contributed 182
 |archive-url=https://web.archive.org/web/20110718173318/http://eprints.lse.ac.uk/25476/1/Motivation_and_Sorting_in_Open_Source_Software_Innovation.pdf 
 |archive-date=July 18, 2011 
}}
</ref> In 2004, development moved to their own server.<ref name=forums20180414/>
Since 2018, the project uses [[GitHub]] for its [[Version control|source repository]] and [[bug tracker]].<ref name=forums20180414>
{{cite web 
  |author1=TrueBrain 
  |title=OpenTTD source migration and other changes 
  |url=https://www.tt-forums.net/viewtopic.php?f=29&t=83056 
  |website=Transport Tycoon Forums 
  |access-date=10 August 2018 
  |language=en-gb 
  |date=14 April 2018
}}
</ref> Starting from April 1, 2021, the game is now also available on [[Steam (service)|Steam]].<ref>{{cite web |url=https://www.openttd.org/news/2021/04/01/openttd-1-11-0.html |title=OpenTTD 1.11.0 |author=TrueBrain |date=2021-04-01 |website=OpenTTD |access-date=2021-04-11}}</ref>

==History==
The development of ''OpenTTD'' was driven by the desire to extend the abilities of ''Transport Tycoon Deluxe'' to support user-made additions to the graphics and gameplay, as well as the desires of users to play the game on more modern [[operating system]]s and alternative computer architectures which the original game (released in 1994 for [[DOS]] and programmed in [[assembly language]]) did not support.

===Prior modifications to ''Transport Tycoon Deluxe''===
There was a prior attempt to modify Transport Tycoon Deluxe to run on more modern operating systems. ''OpenTTD'' was preceded by a commercial conversion of ''Transport Tycoon Deluxe'' to run on [[Windows 95]]. It was created in 1996 by the FISH technology group, but Nola released in 1999 as part of a compilation of older ''Tycoon'' games. This release was still greatly restricted in operating systems and computer architectures it could run on.

Similarly, there was an earlier success aiming to open ''Transport Tycoon Deluxe'' to modification by users. ''[[TTDPatch]]'', initially created by Josef Drexler in 1996–97 and still being developed in 2010, changes the behaviour of ''Transport Tycoon Deluxe'' as it is running, to introduce many new features to the game, such as new graphics, vehicles, industries, etc. ''TTDPatch'' is restricted by the same operating system and computer architecture limits as ''Transport Tycoon Deluxe'' and has limited control over what features of the game can be altered.

===Initial development of ''OpenTTD''===
In 2003, [[Ludvig Strigeus]] announced that he intended to [[reverse engineer]] ''Transport Tycoon Deluxe'' and convert the game to [[C (programming language)|C]]. On March 6, 2004, this re-engineered ''Transport Tycoon Deluxe'' was released and named ''OpenTTD''.<ref name="OpenTTD_0.1" /><ref>
{{cite web
 |title=TTDPatch origin 
 |work=Transport Tycoon Forums 
 |url=http://www.tt-forums.net/viewtopic.php?p=284393#p284393 
 |access-date=2009-12-11 
 |url-status=live 
 |archive-url=https://web.archive.org/web/20110927110931/http://www.tt-forums.net/viewtopic.php?p=284393 
 |archive-date=September 27, 2011 
}}
</ref> {{As of|2024}}, ''OpenTTD'' is still under active development.

The early development of ''OpenTTD'' focused on restructuring the code to improve readability and extensibility. This allowed restoring features like sound and music, improving the user interface and introducing new languages for the GUI. Many new gameplay features and possibilities for user modification were also added around this time, aiming to replicate the abilities of TTDPatch. A major improvement was reprogramming multiplayer (network games) to use the [[Internet Protocol]], allowing multiplayer gaming online and over modern LANs.

By the late 2000s, ''OpenTTD'' was a stable and popular game and development moved toward more substantial changes. 2007 saw the development of support for custom, user-made AIs, which can provide players with more of a challenge than the original AI.<ref>
{{cite journal
 |author1=Luis Henrique Oliveira Rios 
 |author2=Luiz Chaimowicz 
 |date=October 2009 
 |title=trAIns: An Artificial Intelligence for OpenTTD 
 |journal=VIII Brazilian Symposium on Games and Digital Entertainment 
 |publisher=Special Commission of Games and Digital Entertainment of the Computing Brazilian Society 
 |access-date=2009-12-11 
 |url=http://www.sbgames.org/papers/sbgames09/computing/full/cp24_09.pdf 
 |url-status=live 
 |archive-url=https://web.archive.org/web/20110728000737/http://www.sbgames.org/papers/sbgames09/computing/full/cp24_09.pdf 
 |archive-date=July 28, 2011 
}}
</ref><ref>{{cite web
| title        = NoAI Merge
| work         = Official OpenTTD News
| url          = http://www.openttd.org/news/84
| url-status   = dead
| access-date  = 2008-01-18
| archive-url  = https://web.archive.org/web/20180612162957/http://www.openttd.org/en/news/84
| archive-date = 2018-06-12
}}</ref><ref>
{{cite journal 
 |author=Carsten Schnober 
 |date=June 2009 
 |title=Projects on the move 
 |journal=Linux Pro Magazine 
 |publisher=Linux New Media USA, LLC 
 |access-date=2009-12-11 
 |url=http://www.linux-magazine.com/w3/issue/103/Free_Software_Projects.pdf 
 |url-status=dead 
 |archive-url=https://web.archive.org/web/20120224065433/http://www.linux-magazine.com/w3/issue/103/Free_Software_Projects.pdf 
 |archive-date=February 24, 2012 
 }}
</ref> Other more major changes included introducing support for [[IPv6]],<ref>{{cite web
| title      = IPv6 support news article
| work      = Official OpenTTD news
| url      = http://www.openttd.org/en/news/92
| access-date      = 2010-03-07
| archive-date      = July 18, 2011
| archive-url      = https://web.archive.org/web/20110718062934/http://www.openttd.org/en/news/92
| url-status      = dead
}}</ref><ref>
{{cite web
 |title=Changelog for version 1.0
 |work=Changelog in the git branch release/1.0
 |url=https://github.com/OpenTTD/OpenTTD/blob/release/1.0/changelog.txt
 |access-date=2024-03-11 
 }}
</ref> an integrated download system for user-made customisations, and support for alternative base graphics, sound and music sets in 2009. Since 2007, ''OpenTTD'' is gradually being rewritten in [[C++]].<ref>{{cite web|title=Merge the cpp (C++) branch |work=Revision log of OpenTTD's version control system |url=http://vcs.openttd.org/svn/changeset/8038 |archive-url=https://archive.today/20130415131352/http://vcs.openttd.org/svn/changeset/8038 |url-status=dead |archive-date=2013-04-15 |access-date=2009-12-11 }}</ref><!-- Note: I like to link to something else, but the version control system/all sources I could find were from after the first time this fact has been published on Wikipedia and seem to be using Wikipedia as source, so Wikipedia can't use those sources. This leaves little else than linking to the version control system.-->

==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-->

==Reception==
OpenTTD has been praised for the number of improvements it has made to the original Transport Tycoon Deluxe, such as the AI, graphics, sounds, and ability to play multiplayer.<ref>{{cite web
 |last=Blake 
 |first=Michael 
 |title=PC Gaming: Doomed? or zDoomed? 
 |url=http://uk.pc.ign.com/articles/117/1177873p1.html 
 |website=IGN 
 |date=June 23, 2011 
 |access-date=August 10, 2011 
 |url-status=live 
 |archive-url=https://web.archive.org/web/20110627045727/http://uk.pc.ign.com/articles/117/1177873p1.html 
 |archive-date=June 27, 2011 
}}</ref>
OpenTTD received the most votes for Game of the Year for the 2004 Amiga Games Award.<ref>{{cite web
 |title=Amiga Games Award 2004 
 |url=http://obligement.free.fr/hitparade/award2004.php 
 |publisher=Amiga Games Hit Parade 
 |access-date=November 25, 2014 
 |url-status=live 
 |archive-url=https://web.archive.org/web/20141205081329/http://obligement.free.fr/hitparade/award2004.php 
 |archive-date=December 5, 2014 
}}</ref>
Lewis Denby from [[PC Gamer]] ranked OpenTTD 20th in its May 2011 list of best free PC games.<ref>{{cite magazine 
| last= Denby 
| first= Lewis
| title= 20 free PC games you must play
| url= http://www.pcgamer.com/2011/05/03/20-free-pc-games-you-must-play/
| magazine= PC Gamer
| access-date= February 28, 2012
}}</ref>
Hungarian Unix Portal users chose ''OpenTTD'' as favourite (free) game in 2005, 2007, 2009, and 2010.<ref>
{{cite web
| title      = HUP Olvasók Választása Díj 2005 – eredményhirdetés
| work       = Hungarian Unix Portal (HUP)
| url        = http://hup.hu/node/10324
| access-date = 2009-12-11
| language   = hu
}}</ref><ref>
{{cite web
 |title=HUP Olvasók Választása Díj 2007 – eredményhirdetés 
 |work=Hungarian Unix Portal (HUP) 
 |url=http://hup.hu/node/48704 
 |access-date=2009-12-11 
 |language=hu 
 |url-status=live 
 |archive-url=https://web.archive.org/web/20100131203006/http://hup.hu/node/48704 
 |archive-date=January 31, 2010 
}}</ref><ref>
{{cite web
 |title=HUP Olvasók Választása Díj 2009 – eredményhirdetés 
 |work=Hungarian Unix Portal (HUP) 
 |url=http://hup.hu/cikkek/20100110/hup_olvasok_valasztasa_dij_2009_eredmenyhirdetes 
 |access-date=2010-01-14 
 |language=hu 
 |url-status=live 
 |archive-url=https://web.archive.org/web/20100115000432/http://hup.hu/cikkek/20100110/hup_olvasok_valasztasa_dij_2009_eredmenyhirdetes 
 |archive-date=January 15, 2010 
}}</ref><ref>
{{cite web
 |title=HUP Olvasók Választása Díj 2010 – eredményhirdetés 
 |work=Hungarian Unix Portal (HUP) 
 |url=http://hup.hu/cikkek/20110109/hup_szavazas_hovd_2010_hup_olvasok_valasztasa_dij 
 |access-date=2011-05-03 
 |language=hu 
 |url-status=live 
 |archive-url=https://web.archive.org/web/20110113150641/http://hup.hu/cikkek/20110109/hup_szavazas_hovd_2010_hup_olvasok_valasztasa_dij 
 |archive-date=January 13, 2011 
}}</ref> In 2014 ''OpenTTD'' was named by [[PCGamer]] among the "Ten top fan remade classics you can play for free right now".<ref>{{cite magazine|url=http://www.pcgamer.com/ten-top-fan-remade-classics-you-can-play-for-free-right-now/ |title=Ten top fan-remade classics you can play for free right now |author=Craig Pearson |date=January 1, 2014 |magazine=[[PC Gamer]] |url-status=live |archive-url=https://web.archive.org/web/20160510051006/http://www.pcgamer.com/ten-top-fan-remade-classics-you-can-play-for-free-right-now/ |archive-date=May 10, 2016 }}</ref>
In 2015 and 2016, [[Rock, Paper, Shotgun]] ranked ''OpenTTD'' 8th on its The 50 Best Free Games on PC list.<ref>{{cite web|title=The 50 Best Free Games on PC|url=https://www.rockpapershotgun.com/2015/10/16/best-free-games-on-pc/44/|website=[[Rock, Paper, Shotgun]]|access-date=October 9, 2016|date=October 16, 2015|archive-url=https://web.archive.org/web/20161009103623/https://www.rockpapershotgun.com/2015/10/16/best-free-games-on-pc/44/|archive-date=October 9, 2016|url-status=live}}</ref><ref>{{Cite web|url=https://www.rockpapershotgun.com/2016/10/31/the-50-best-free-games-on-pc/44/ |title=The 50 Best Free Games on PC |last=RPS |date=October 31, 2016 |website=Rock, Paper, Shotgun |language=en-US |access-date=2017-03-10 |url-status=live |archive-url=https://web.archive.org/web/20170312204634/https://www.rockpapershotgun.com/2016/10/31/the-50-best-free-games-on-pc/44/ |archive-date=March 12, 2017 }}</ref>

==See also==
{{Portal|Free and open-source software}}
*[[List of free and open-source software packages]]
*[[List of open-source games]]
* ''[[OpenRCT2]]''
* ''[[Simutrans]]''

==References==
<!-- Please see [[Wikipedia:References]] for an elaborate guide on how to add references to this section. -->
{{Reflist|30em}}

==External links==
{{Commons category|OpenTTD}}
* {{Official website}}
* [https://wiki.openttd.org/en/ ''OpenTTD'' wiki]
{{Chris Sawyer games}}

{{DEFAULTSORT:Openttd}}
[[Category:2004 video games]]
[[Category:Transport Tycoon]]
[[Category:Windows games]]
[[Category:AmigaOS 4 games]]
[[Category:Linux games]]
[[Category:MorphOS games]]
[[Category:Multiplayer online games]]
[[Category:Cooperative video games]]
[[Category:Fan games]]
[[Category:Free software programmed in C++]]
[[Category:Open-source video games]]
[[Category:MacOS games]]
[[Category:Video games with isometric graphics]]
[[Category:Transport business simulation games]]
[[Category:Free software that uses SDL]]
[[Category:Multiplayer and single-player video games]]
[[Category:Creative Commons-licensed video games]]
[[Category:Video games developed in Sweden]]
[[Category:Free and open-source Android software]]