Reminds me of a 90's gameshow back here in the UK, Nightmare. One player would be blindfolded whilst the other team member tried to guide them around a grid avoiding being captured.. "Left, no, my left, no I mean your left, no!!!"|

Also https://www.voicebot.net/ or https://voiceattack.com/ is what you might want, from a quick google. Add an rj11 to 3.5mm connection, hey presto ;)

There was a nice multiplayer game like that at the Expo 2000 with 6 players around a large table display using voice commands. There's a picture still at https://www.unit-design.de/de/projekte/daimler-chrysler-lab-...

You can play text adventures over the phone with Asterisk, CMU-sphinx and some tweaked up dfrotz.

Also, Frotz has been ported to more devices than Doom.