Descent or Descent 2 Mission File
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What is a HOG file?
In the Descent series of games, players pilot a spaceship on a series of missions to destroy mines infected by an alien computer virus. Interplay Productions and Parallax Software released the first Descent in 1995 for MS-DOS and Mac; they released Descent 2 in 1996.
Both Descent and Descent 2 store their mission data in a single HOG file. In Descent, this file is named descent.hog. In Descent 2, this file is named descent2.hog. Descent and Descent 2 modders often extract the constituent files HOG files contain, to modify the games' gameplay. After modifying the games' files, modders repackage them in their associated HOG file.
NOTE: Modders using custom Descent level creators can create custom HOG files, which may have names other than descent.hog or descent2.hog.
Common HOG Filenames
Descent.hog - The original Descent's HOG file.
Descent2.hog - Descent 2's HOG file.
How to open a HOG file
HOG files are not meant to be opened or edited by players. However, Descent modders have created utilities, such as the HOG Packer and Unpacker (Windows), that allow them to extract files from and add files to HOG files.