In "Sing the Earth Electric," a one-shot of the DIALECT rpg (A Game About Language and How it Dies) by http://thornygames.com, humans have left the earth, and charged robots with restoring it to its primeval state for the "next" inhabitants, whatever they may be. John, Lee & Hal play as three of those robots in an isolation they call "Terra-1," as their own unique language develops and dies as the isolation slowly comes to an end.