Fanatical mystery key from recent bundle. Right now, no region restrictions are listed: https://www.fanatical.com/en/game/surgeon-simulator

( How to check for region locks on a Fanatical store page: https://support.fanatical.com/hc/en-us/articles/202652231-Can-games-be-activated-in-the-country-that-my-gamer-account-is-associated-with )