Railsimulator.com‘s “Kent High Speed: London to Faversham” route for Train Simulator 2013 has been published via Steam as a ‘standalone expansion’.

Intended for use both by existing and new users, the route includes the core TS2013 functionality, so existing users will see it as a DLC product in their existing installation, while new users who do not have the TS2013 base pack can run the South East English route on its own.