Telesensory Systems Inc. created probably the world's first commercial stereo audio game with speech: The Game Center model E1A in 1977.
It had 8 games in total. You can listen to the audio-cassette instructions and some of the game-play here: https://youtu.be/au9u3s-qI4M.
Lots more information can be found here: https://www.oneswitch.org.uk/art.php?id=366
Is there a developer who would like to preserve this history further in making a simulation of this game? Ideally for PC using original samples from these tapes and a TSI Speech+ calculator which I should be able to help with in the coming months.
Please reach out here, or at [email protected] if seriously interested. Perhaps it could be hosted at itch.io and OneSwitch.org.uk and given some sort of home here at AudioGames.net?
Fingers crossed...