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Transport Fever 3 Modding

A modding handbook and a complete scripting reference for Transport Fever 3, built from the files that ship with the game.

  • Guides

    How modding works: setting up the tools, the anatomy of a mod, the scripting model, constructions, models, GUI and missions.

    Read the guides

  • API reference

    Every record, function, field and enum of the engine API (api.*) and of the base game's script libraries, with cross-linked types.

    Browse the reference · Globals A–Z

  • For coding agents

    The whole reference and the guides as an Agent Skills package for Claude Code, Codex, Gemini CLI and other agents. Install instructions are in its README.

    Download the skill (zip) · llms.txt

    Current version: 2026.10.08.3

Where the content comes from

  • The reference is generated from the Teal definition files in the game folder (api/tealdef and base/tealdef). Descriptions from those files are shown as they are.
  • Where the game files have no description, text written for this site fills the gap. It is always marked like this: written for this site, and it is based on how the base game itself uses the symbol.
  • The guides are written for this site from the game's definitions, the base game content and the official campaign mods.

The official modding wiki by Urban Games is at https://wiki.transportfever3.com/doku.php?id=modding:start. The guides link its pages wherever they cover the same topic.

Use the search (top right, or press /) to jump to any symbol by name, for example sendCommand or ConstructionUtil.