5 - 1.0) [About](#10-about)
6 - 1.1) [Downloading OpenTTD](#11-downloading-openttd)
7 - 1.2) [OpenTTD gameplay manual](#12-openttd-gameplay-manual)
8 - 1.3) [Supported platforms](#13-supported-platforms)
9 - 1.4) [Installing and running OpenTTD](#14-installing-and-running-openttd)
10 - 1.5) [Add-on content / mods](#15-add-on-content--mods)
11 - 1.6) [OpenTTD directories](#16-openttd-directories)
12 - 1.7) [Compiling OpenTTD](#17-compiling-openttd)
13 - 2.0) [Contact and community](#20-contact-and-community)
14 - 2.1) [Contributing to OpenTTD](#21-contributing-to-openttd)
15 - 2.2) [Reporting bugs](#22-reporting-bugs)
16 - 2.3) [Translating](#23-translating)
17 - 3.0) [Licensing](#30-licensing)
18 - 4.0) [Credits](#40-credits)
22 OpenTTD is a transport simulation game based upon the popular game Transport Tycoon Deluxe, written by Chris Sawyer.
23 It attempts to mimic the original game as closely as possible while extending it with new features.
25 OpenTTD is licensed under the GNU General Public License version 2.0, but includes some 3rd party software under different licenses.
26 See the section ["Licensing"](#30-licensing) below for details.
28 ## 1.1) Downloading OpenTTD
30 OpenTTD can be downloaded from the [official OpenTTD website](https://www.openttd.org/).
32 Both 'stable' and 'nightly' versions are available for download:
34 - most people should choose the 'stable' version, as this has been more extensively tested
35 - the 'nightly' version includes the latest changes and features, but may sometimes be less reliable
37 OpenTTD is also available for free on [Steam](https://store.steampowered.com/app/1536610/OpenTTD/), [GOG.com](https://www.gog.com/game/openttd), and the [Microsoft Store](https://www.microsoft.com/p/openttd-official/9ncjg5rvrr1c). On some platforms OpenTTD will be available via your OS package manager or a similar service.
40 ## 1.2) OpenTTD gameplay manual
42 OpenTTD has a [community-maintained wiki](https://wiki.openttd.org/), including a gameplay manual and tips.
45 ## 1.3) Supported platforms
47 OpenTTD has been ported to several platforms and operating systems.
49 The currently supported platforms are:
51 - Linux (SDL (OpenGL and non-OpenGL))
52 - macOS (universal) (Cocoa)
53 - Windows (Win32 GDI / OpenGL)
55 Other platforms may also work (in particular various BSD systems), but we don't actively test or maintain these.
57 ### 1.3.1) Legacy support
58 Platforms, languages and compilers change.
59 We'll keep support going on old platforms as long as someone is interested in supporting them, except where it means the project can't move forward to keep up with language and compiler features.
61 We guarantee that every revision of OpenTTD will be able to load savegames from every older revision (excepting where the savegame is corrupt).
62 Please report a bug if you find a save that doesn't load.
64 ## 1.4) Installing and running OpenTTD
66 OpenTTD is usually straightforward to install, but for more help the wiki [includes an installation guide](https://wiki.openttd.org/en/Manual/Installation).
68 OpenTTD needs some additional graphics and sound files to run.
70 For some platforms these will be downloaded during the installation process if required.
72 For some platforms, you will need to refer to [the installation guide](https://wiki.openttd.org/en/Manual/Installation).
75 ### 1.4.1) Free graphics and sound files
77 The free data files, split into OpenGFX for graphics, OpenSFX for sounds and
78 OpenMSX for music can be found at:
80 - https://www.openttd.org/downloads/opengfx-releases/ for OpenGFX
81 - https://www.openttd.org/downloads/opensfx-releases/ for OpenSFX
82 - https://www.openttd.org/downloads/openmsx-releases/ for OpenMSX
84 Please follow the readme of these packages about the installation procedure.
85 The Windows installer can optionally download and install these packages.
88 ### 1.4.2) Original Transport Tycoon Deluxe graphics and sound files
90 If you want to play with the original Transport Tycoon Deluxe data files you have to copy the data files from the CD-ROM into the baseset/ directory.
91 It does not matter whether you copy them from the DOS or Windows version of Transport Tycoon Deluxe.
92 The Windows install can optionally copy these files.
94 You need to copy the following files:
96 - trg1r.grf or TRG1.GRF
97 - trgcr.grf or TRGC.GRF
98 - trghr.grf or TRGH.GRF
99 - trgir.grf or TRGI.GRF
100 - trgtr.grf or TRGT.GRF
103 ### 1.4.3) Original Transport Tycoon Deluxe music
105 If you want the Transport Tycoon Deluxe music, copy the appropriate files from the original game into the baseset folder.
106 - TTD for Windows: All files in the gm/ folder (gm_tt00.gm up to gm_tt21.gm)
107 - TTD for DOS: The GM.CAT file
108 - Transport Tycoon Original: The GM.CAT file, but rename it to GM-TTO.CAT
111 ## 1.5) Add-on content / mods
113 OpenTTD features multiple types of add-on content, which modify gameplay in different ways.
115 Most types of add-on content can be downloaded within OpenTTD via the 'Check Online Content' button in the main menu.
117 Add-on content can also be installed manually, but that's more complicated; the [OpenTTD wiki](https://wiki.openttd.org/) may offer help with that, or the [OpenTTD directory structure guide](./docs/directory_structure.md).
119 ### 1.5.1) AI opponents
121 OpenTTD comes without AI opponents, so if you want to play with AIs you have to download them.
123 The easiest way is via the 'Check Online Content' button in the main menu.
125 You can select some AIs that you think are compatible with your playing style.
127 AI help and discussions may also be found in the [AI section of the forum](https://www.tt-forums.net/viewforum.php?f=65).
129 ### 1.5.2) Scenarios and height maps
131 Scenarios and heightmaps can be added via the 'Check Online Content' button in the main menu.
135 A wide range of add-content is available as NewGRFs, including vehicles, industries, stations, landscape objects, town names and more.
137 NewGRFs can be added via the 'Check Online Content' button in the main menu.
139 See also the wiki [guide to NewGRFs](https://wiki.openttd.org/en/Manual/NewGRF) and [the forum graphics development section](https://www.tt-forums.net/viewforum.php?f=66).
141 ### 1.5.4) Game scripts
143 Game scripts can provide additional challenges or changes to the standard OpenTTD gameplay, for example setting transport goals, or changing town growth behaviour.
145 Game scripts can be added via the 'Check Online Content' button in the main menu.
147 See also the wiki [guide to game scripts](https://wiki.openttd.org/en/Manual/Game%20script) and [the forum graphics game script section](https://www.tt-forums.net/viewforum.php?f=65).
149 ### 1.6) OpenTTD directories
151 OpenTTD uses its own directory structure to store game data, add-on content etc.
153 For more information, see the [directory structure guide](./docs/directory_structure.md).
155 ### 1.7) Compiling OpenTTD
157 If you want to compile OpenTTD from source, instructions can be found in [COMPILING.md](./COMPILING.md).
160 ## 2.0) Contact and Community
164 - [OpenTTD website](https://www.openttd.org)
165 - IRC chat using #openttd on irc.oftc.net [more info about our irc channel](https://wiki.openttd.org/en/Development/IRC%20channel)
166 - [OpenTTD on Github](https://github.com/openTTD/) for code repositories and for reporting issues
167 - [forum.openttd.org](https://forum.openttd.org/) - the primary community forum site for discussing OpenTTD and related games
168 - [OpenTTD wiki](https://wiki.openttd.org/) community-maintained wiki, including topics like gameplay guide, detailed explanation of some game mechanics, how to use add-on content (mods) and much more
170 'Unofficial' channels
172 - the OpenTTD wiki has a [page listing OpenTTD communities](https://wiki.openttd.org/en/Community/Community) including some in languages other than English
175 ### 2.1) Contributing to OpenTTD
177 We welcome contributors to OpenTTD. More information for contributors can be found in [CONTRIBUTING.md](./CONTRIBUTING.md)
180 ### 2.2) Reporting bugs
182 Good bug reports are very helpful. We have a [guide to reporting bugs](./CONTRIBUTING.md#bug-reports) to help with this.
184 Desyncs in multiplayer are complex to debug and report (some software development skils are required).
185 Instructions can be found in [debugging and reporting desyncs](./docs/debugging_desyncs.md).
190 OpenTTD is translated into many languages. Translations are added and updated via the [online translation tool](https://translator.openttd.org).
195 OpenTTD is licensed under the GNU General Public License version 2.0.
196 For the complete license text, see the file '[COPYING.md](./COPYING.md)'.
197 This license applies to all files in this distribution, except as noted below.
199 The squirrel implementation in `src/3rdparty/squirrel` is licensed under the Zlib license.
200 See `src/3rdparty/squirrel/COPYRIGHT` for the complete license text.
202 The md5 implementation in `src/3rdparty/md5` is licensed under the Zlib license.
203 See the comments in the source files in `src/3rdparty/md5` for the complete license text.
205 The implementations of Posix `getaddrinfo` and `getnameinfo` for OS/2 in `src/3rdparty/os2` are distributed partly under the GNU Lesser General Public License 2.1, and partly under the (3-clause) BSD license.
206 The exact licensing terms can be found in `src/3rdparty/os2/getaddrinfo.c` resp. `src/3rdparty/os2/getnameinfo.c`.
208 The fmt implementation in `src/3rdparty/fmt` is licensed under the MIT license.
209 See `src/3rdparty/fmt/LICENSE.rst` for the complete license text.
214 See [CREDITS.md](./CREDITS.md)