You should see a checkbox for “General Mature Content.” Two additional entries should appear. You can also access this page via your browser by clicking on the hamburger menu in the top left, followed by “Preferences” under “Account details.” Once you’re onto the next page, scroll down to the “Mature Content” subheading. If you’re using the Steam app, click on your username in the top-right corner and select “Store preferences” from the drop-down menu. Sign up or log into Steam, either in your browser or via Steam’s dedicated program. In order to view Steam’s adult games selection, you’ll need a Steam account.