The TSW5 Starter Pack is free to register to your account on Steam, Epic, Microsoft and Sony platforms, available to claim until Oct 17 2024.
If you don’t have any current or previous TSW addons you will only have access to the tutorial training centre route.
If you have compatible content from earlier Train Sim World routes, getting the starter pack will allow you to obtain the TSW5 version of the route and locos as a free DLC.