Pyst (stylised as PYST) is an adventure computer game released in October 1996. It was created as a parody of the highly successful adventure game Myst. Pyst was written by Peter Bergman, a co-founder of the Firesign Theatre, and was published by Parroty Interactive, with Bergman, Stallone, Inc. as co-publisher. Mindscape began distributing the game on August 20, 1997. The parody features full motion video of actor John Goodman as "King Mattruss", the ruler of "Pyst Island". Versions of the game were produced for both the Windows PC and Apple Macintosh operating systems.