“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.”
You can technically change the region of your steam account but it’s not something you can do often or easily. They lock you into a region to prevent you from country hopping to get cheaper prices on games that implement region pricing.