Scania Truck Driving Simulator and does not officially offer free product keys . While the game is technically free to download as a trial version
Upgrading from the trial to the full version unlocks several key modes: How to Activate the Game | Scania Truck Driving Simulator
If you purchase a digital key, follow these steps to activate the full game: Steam Activation : Open Steam, click "Add a Game" in the bottom left, select "Activate a Product on Steam," and enter your key. Official Site Version
: If using the standalone installer, run the game and wait for the activation screen. Paste your product key and click "Activate Game" Scania Truck Driving Simulator What the Full Version Includes