Fallout and Fallout 2 file formats

This article lists all of the different categories of file formats used to store data in both Fallout and Fallout 2. At their core, both games' engines utilize these formats very similarly, if not identically.

Artwork / Animation

 * FRM file - Frame Graphics file, used for the game-world artwork
 * RIX file - ColoRIX image file, used as splash screen while loading the game

Audio / Video

 * ACM file - Compressed audio file
 * MVE file - Compressed video file

Script

 * INT file - Scripts attached to the various characters and objects found in the game world

Text

 * BIO file - Pre-made character biographies
 * GAM file - Holds all of the global variables and global map variables  in the game
 * MSG file - Dialogue / message file used for characters, locations, and all other text found in-game
 * SVE file - Holds movie subtitle data