This series contains notebooks, game design documentation, outlines, proposals, story drafts, sketches, testing documentation, and other materials related to games, stories, and other creative endeavors by Michael and/or Muffy Berlyn. This series begins with chronologically ordered folders of game design documentation (with unspecified dates marked in brackets), with undated materials in Boxes 6 and 7 ordered alphabetically. Remaining note or reference folders in Box 7 are also ordered alphabetically.

Original titles on folders or notebooks are noted in quotation marks. When possible, per original annotations, the primary creator has been indicated in brackets [e.g., Michael Berlyn, Muffy Berlyn].