.INFORM File Extension

Project created by Inform, an IDE that enables you to create Interactive Fiction (IF) programs used by Z-code interpreters, such as Zoom or Frotz; contains project contents, such as the story, index data, and source files used to build a game.

To create an INFORM file, simply select File → Save or Save As..., name the file, select the save location, and click Save.

To open an INFORM file, select File → Open Project..., navigate to your file, and click Open.