### 1.3.1) Legacy support

Platforms, languages and compilers change.

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.

We guarantee that every revision of OpenTTD will be able to load savegames from every older revision (excepting where the savegame is corrupt).

Please report a bug if you find a save that doesn't load.

## 1.4) Installing and running OpenTTD

OpenTTD is usually straightforward to install, but for more help the wiki [includes an installation guide](https://wiki.openttd.org/en/Manual/Installation).

OpenTTD needs some additional graphics and sound files to run.

For some platforms these will be downloaded during the installation process if required.

For some platforms, you will need to refer to [the installation guide](https://wiki.openttd.org/en/Manual/Installation).

### 1.4.1) Free graphics and sound files

The free data files, split into OpenGFX for graphics, OpenSFX for sounds and

OpenMSX for music can be found at:

Please follow the readme of these packages about the installation procedure.

The Windows installer can optionally download and install these packages.

### 1.4.2) Original Transport Tycoon Deluxe graphics and sound files

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.

It does not matter whether you copy them from the DOS or Windows version of Transport Tycoon Deluxe.

The Windows install can optionally copy these files.

You need to copy the following files:

- sample.cat

- trg1r.grf or TRG1.GRF

- trgcr.grf or TRGC.GRF

- trghr.grf or TRGH.GRF

- trgir.grf or TRGI.GRF

- trgtr.grf or TRGT.GRF

### 1.4.3) Original Transport Tycoon Deluxe music

If you want the Transport Tycoon Deluxe music, copy the appropriate files from the original game into the baseset folder.

- TTD for Windows: All files in the gm/ folder (gm_tt00.gm up to gm_tt21.gm)

Game scripts can provide additional challenges or changes to the standard OpenTTD gameplay, for example setting transport goals, or changing town growth behaviour.

Game scripts can be added via the 'Check Online Content' button in the main menu.

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).

### 1.6) OpenTTD directories

OpenTTD uses its own directory structure to store game data, add-on content etc.

For more information, see the [directory structure guide](./docs/directory_structure.md).

### 1.7) Compiling OpenTTD

If you want to compile OpenTTD from source, instructions can be found in [COMPILING.md](./COMPILING.md).

## 2.0) Contact and Community

'Official' channels

- [OpenTTD website](https://www.openttd.org)

- IRC chat using #openttd on irc.oftc.net [more info about our irc channel](https://wiki.openttd.org/en/Development/IRC%20channel)

- [forum.openttd.org](https://forum.openttd.org/) - the primary community forum site for discussing OpenTTD and related games

- [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

'Unofficial' channels

- the OpenTTD wiki has a [page listing OpenTTD communities](https://wiki.openttd.org/en/Community/Community) including some in languages other than English

### 2.1) Contributing to OpenTTD

We welcome contributors to OpenTTD.  More information for contributors can be found in [CONTRIBUTING.md](./CONTRIBUTING.md)

### 2.2) Reporting bugs

Good bug reports are very helpful.  We have a [guide to reporting bugs](./CONTRIBUTING.md#bug-reports) to help with this.

Desyncs in multiplayer are complex to debug and report (some software development skils are required).

Instructions can be found in [debugging and reporting desyncs](./docs/debugging_desyncs.md).

### 2.3) Translating

OpenTTD is translated into many languages.  Translations are added and updated via the [online translation tool](https://translator.openttd.org).

12.1 (2021-11-08)

------------------------------------------------------------------------

Feature: Button to toggle showing advanced signal types (#9617)

Change: Don't show screenshot GUI in screenshots (#9674)

Change: Suppress panning in intro game, while user is interacting with the GUI (#9645)

Change: Draw rotor in cursor when dragging helicopters in depots (#9612)

Fix: Invalid memory access when loading a currency NewGRF (#9675)

Fix #9579: Object and HQ construction is Construction cost, not Property Maintenance (#9673)

Fix #9669: Ships exiting a blocked depot/lock could exit in the wrong direction (#9672)

Fix: Every 16th client never reconnects after server restart (#9666)

Fix #9643: Screenshots were always written as BMP files (#9644)

Fix #9630: Intro game could zoom in/out more than allowed by settings (#9633)

Fix #9626: Incorrect loading of script saved data (#9629)

Fix: Emergency crash save had the wrong NewGRF list saved in it (#9627)

Fix #9595: Always use plural forms of cargo for subsidy strings (#9619)

Fix #9614: Refresh rate dropdown was still active when vsync was enabled (#9618)

Fix: Don't use 'server address' string in server list when displaying an invite code (#9615)

12.0 (2021-10-17)

------------------------------------------------------------------------

Add: [Network] Keep the refresh button in lowered state while refreshing (#9600)

Add: Console command to list search directories for various things (#9583)

Fix: Try all possible reverse directions when a ship reaches a dead end (#9610)