What to do
- Open the main-menu Mod Hub. Use the in-game browser described by the developer rather than importing an old TF2 installation-directory guide. Check that the listing is for Transport Fever 3 and suits your platform.
- Read the listing before subscribing. Check the creator’s description, supported version and dependencies. A feature mod and a decorative asset can require different supporting content; do not assume matching names make two mods interchangeable.
- Subscribe and allow the download to finish. The announced Mod Hub handles downloads and updates automatically. Compare the selected listing with the subscribed/downloaded information the browser provides; subscribing alone is not a claim that the mod is already active in every save.
- Review the required mods. TF3 uses unique mod IDs and detects missing dependencies during download. Follow the listed dependencies and check the download result. A matching title is not a substitute for the required mod ID.
- Check the actual game/save controls before playing. Use the release build’s available mod-management controls and the creator’s instructions to apply the download to your world. The cited announcement does not establish the exact save-enable menu or how every script mod behaves in an existing world. Keep a backup before testing changes to a valued save.
How to tell it worked
The intended TF3 mod and its required dependencies have downloaded. Then confirm the expected content in a suitable test world using the actual release controls. A subscription badge alone is not evidence that the content is enabled or compatible with an existing save.
If you are still stuck
- A dependency is missing: Read the required mod ID and listing. Confirm it is available for your platform and that its own download completed.
- You are looking for Steam Workshop: The July Highlights blog says the Workshop decision was still under consideration. A final launch announcement is needed before claiming either inclusion or permanent absence.
- You want to install a local archive: The developer confirms manual installation remains possible for PC/Mac but does not give a final directory here. Do not reuse a TF2 folder as a confirmed TF3 path.
- A downloaded mod breaks a world: Use the creator’s compatibility instructions and your backup. Do not assume disabling a mod reverses changes already stored in a save.