The Discovery is, more or less, a conventional single-player text adventure game. But the second game, Escape From Solaris, is for two players. It can be played either in split-screen mode on a single BBC Micro, with players taking alternate turns at the keyboard, or, unusually, on two BBC Micros connected together with a serial communications cable (RS-423).
This early form of “networked gaming” was an innovation. In fact, Escape From Solaris is the only Beeb game I know of that works in quite this way. (I did manage to find a BBC Micro version of Battleships that also used RS-423 comms between two Beebs, but Solaris is probably the only text adventure to do so.)
I’d been wanting to try to get the game running on two machines for quite a while, and last year I finally got around to it (after taking ages to realise that the way the comms lead had to be wired up was actually rather obvious). See the YouTube video above. Thanks to Lee for letting me borrow his setup and for helping me demo the game.
If you want to try Escape From Solaris yourself, you can play the game in an emulator in your browser, but only in split-screen mode in a single window (because networked Beebs are not included):