ESM document file contains game data for Elder Scrolls 4 and 5 (named Oblivion and Skyrim, respectively). ESM files shold key game data related to graphics and multimedia, such as texture data, audio tracks, audio effects, and videos.

Creation Kit (TESCS) utility allows editing of ESM files. It enables users to modify the game world and create game plugins. One of the game’s creators — Todd Howard — introduced this solution to encourage fans and players to contribute to the series future development.