Just wanted to let you know that this game is currently region locked for regions that want proper age verification on Steam. Devs who didn't fill out the Steam interns questionnaire regarding their own game's content will not have Steam owns age restriction assessment shown on it's store page.
The questionnaire can accessed via the Steamworks developer tools.
(Link contains more info and the link to the questionnaire)
https://partner.steamgames.com/doc/gettingstarted/contentsurvey/germany