File referenced by AGiliTy, an Adventure Game Toolkit (AGT) interpreter; contains encrypted game information about accepted nouns for typing commands in the game; referenced by the AGT game as the player navigates through the story.

In order to navigate through Interactive fiction games, like AGT games, you must type commands in the game. Since the story revolves around typing, verbs and nouns are important parts of the game. The list of usable verbs often stays the same from game to game. But nouns differ greatly from game to game. The nouns (most often objects) are interactive, you can do many different actions with nouns, such as carry, drop, unlock, open, and eat. AGT games are often accompanied with a variety files. Each file contains game data, including .TTL, .VOC, and .INS files. Because of the large number of files that accompany the AGT game, the files can be converted into a single .AGX file with the AGT2AGX utility that comes with AGiliTy. This conversion reduces clutter, load time, and game size. NOTE: DA3 files are similar to .DA2, .DA4, and .DA5 files. These files contain game data referenced for different aspects of the game.