Dial-a-Grue: play Zork with nothing but an old phone

https://www.youtube.com/watch?time_continue=2&v=cJzgiDgBpcw

The first iteration of Dial-a-Grue, in 2011, was to kit out an old rotary dial phone with an embedded computer and text-to-speech engine so that you could play Zork with nothing but the handset. The new, 2.0 version of the project, is "to port Zork I (via a z-code interpreter) to an embedded platform, and enclose that and an old modem inside a telephone, so that the game can be played from a teletype, TDD, or old computer with an acoustically coupled modem." (via JWZ)