I just found this site that has a bunch of BBC Micro games, including The Darkness Of Raven Wood and other text adventures. You can play them online or download them and use an emulator (or, I assume, you can transfer the downloaded ones to an actual BBC Micro somehow…).
I discovered this site only a week or so ago. It’s a fantastic resource, a World of Spectrum for the BBC Micro, but I do wonder about the copyright status of the games hosted there. It’s surprising to see how many brand new games are appearing for these 8-bit platforms. Given that emulators are available for these old machines on desktop, tablet and mobile, it’s not really fair to describe them as obsolete any more. They’re just another type of VM!