Basic Role-Playing System SRD, the Chaosium has made the Questworlds SRD available on their web-site! (Seems the Lockdown is beneficial for table-top role-playing...)
However, whereas the BRP SRD was a mere 23-page booklet that paled in comparison to the 2008 “Big Gold Book”, the Questworlds SRD, at 76 very dense pages, is a hefty, fully-fledged role-playing game.
I already hear you saying “But praytell, what on Earth is Questworlds?”. Well, Questworlds is the genericised version of HeroQuest that the Chaosium has been promising us for years — at least since October 2017. You can now publish your own QW-driven role-playing game, à la Mythic Russia, following the guidelines on Chaosium’s web-site.