Please find below frequently asked questions about mods in general and about the Train Fever modding system (introduced on February 27, 2015).
What is a mod?
Mod is an abbreviation for modification and therefore, mods modify or extend a game. Typical examples in the context of Train Fever are new vehicles which are added to the game or a new look and feel (textures) for the game’s terrain. However, there are countless other mods available which modify the game in different ways.
Where can I find mods?
At these sites you can look for mods and typically download mods as (zip) archives.
How can I install a mod?
Download the mod (zip) archive and store it at a place of your choice. To install the mod, we suggest to use one of the following available mod managers (make sure you run the latest versions):
Mods can also be installed manually. If you prefer this way, just extract the (zip) archive into the Train Fever mod folder which usually is located here:
“C:\Program Files (x86)\Steam\SteamApps\common\Train Fever\mods”
Make sure that the mod has its own folder inside the “..\mods” folder (usually the zip archive already contains this folder).
How can I enable a mod?
Start Train Fever and go to the new game page. Switch to the “Advanced” tab and there you should see the installed mods. To enable a mod, move it from the “Available mods” (left) to the “Active mods” (right). After starting the game the active mods will then be “coupled” to the game. If you save and reload the game later the active mods will automatically be enabled again.
It’s also possible to add mods to existing save games (enable additional mods for a save game). However, because some mods modify game resources in a critical way, doing this can lead to unexpected behavior or even game crashes. Nevertheless adding mods to existing save games is needed in some cases.
I’m using mods in the “old way”, how can I switch to new modding system?
If you installed mods in the old way (copied files in the game’s “/res” folder), we highly recommend to clean the installation.
To do so, please first delete the “C:\Program Files (x86)\Steam\SteamApps\common\Train Fever\res” folder and second run the “Verify” option in the Steam client (Steam Client -> Train Fever -> Properties -> Local Files -> “Verify Integrity of Game Cache”).
Once this is done you can re-install the mods in the new way.
Finally, if you have save games which are dependent on previously installed mods, you need to activate the mods for these save games. This last step is crucial, if you don’t make it, your old save games may crash when loading. Therefore, before cleaning the installation, you should be aware of which mods you have installed so that you can re-install and add these mods to your save games afterwards.
What is the advantage of the new modding system?
Clean mod installation and uninstallation: Because each mod is located in its own folder now, mods can be installed and uninstalled independently of the game’s base resource and other mods now. With the old way of modding, mods were copied into the game’s main resource folder and existing / other files were overridden.
Game updates no longer destroy mods: Each time a new version of Train Fever is available, Steam will update game resources. Prior to the new modding system, resources of mods were overridden then and as a consequence, certain mods were destroyed.
Save games remember mods: Multiple games with different active mods can be played now without changing the mod installation. Because save games remember the active mods, installing new mods will no longer destroy save games (they simply ignore new mods as long as they are not activated for the save game).
More modding possibilities: A bunch of new (script) modding features has been added with the new modding system. For example, a mod which sets all costs to zero (i.e. a sandbox mode) can now be implemented with a simple script instead of copying all vehicle resources. The new system is much more powerful and mods can be implemented in a cleaner way.