Dear game developer,

It appears this game is not available in Germany, presumably due to a missing age rating.
If that is the case, I kindly ask you to fill out the form provided by Steam so that the game may be available again.

The form takes only 2-3 minutes to complete:
https://partner.steamgames.com/healthcheck/missingratingforgermany/

You can find more information about this here:
https://partner.steamgames.com/doc/gettingstarted/contentsurvey/germany

Thank you!