There is only one file type that uses the .TAF extension:
ADRIFT Text Adventure File
Game file created by ADRIFT Generator, a program used to build text-based adventure games; contains all game assets, including the display text, commands, and music; stores the rooms, characters, objects, tasks, and events for the game.
TAF files are used for storing data during the game building process. Once they are complete, the resulting game can be played with the ADRIFT Runner program.
NOTE: ADRIFT stands for "Adventure Development & Runner - Interactive Fiction Toolkit."
Updated: November 12, 2010