Game file referenced by AGiliTy, a program that interprets Adventure Game Toolkit (AGT) games; contains encrypted game data about any creatures featured in the game; referenced by the AGT game as the player navigates through the story; will not exist if there are no creatures in the game.

In order to navigate through Interactive fiction games, like AGT games, you must type commands in the game. The story will change depending on what decisions you type. You will most likely encounter other living things in your game, these are considered creatures and will be "friendly" or "hostile." AGT games are often packaged with a number of files that contain game data, including .INS, .TTL, and .VOC 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 game size, load time, and clutter. NOTE: DA4 files are similar to .DA3, .DA5, and .DA6 files. These files contain game data referenced for different aspects of the game.