“Steam started blocking Australian users from viewing or buying 18+ rated games on September 9, 2026, unless they attach a valid credit card to their account. Valve’s rollout affects hundreds of mature-rated titles, including Cyberpunk 2077 and Doom Eternal, and it doesn’t matter whether the account is brand new or fifteen years old with a library full of paid-for adult games. Without a credit card on file, those store pages, search results, and even home-page recommendations simply disappear.”



I’ve checked this. I was able to install an already-owned R18+ game with no problems. I can’t view its store page.
Not as far as I’ve seen. The Witcher is MA15+, and I can view its store page.
That’s all just my experience, though. Maybe other people are having a different experience, but I suggest people try for themselves instead of accepting worst case scenarios people are saying online.
Good to know about reinstallation.
I checked roughly 10 games on my wishlist and could view all of them. The details re: game rating seem to be obscure on steam, it’s not something I have looked for before.