What is .ESM file extension?
Game data file used by The Elder Scrolls IV: Oblivion and The Elder Scrolls V: Skyrim single-player role-playing games; contains various kinds of data, including 3D meshes, textures, video, music, sound, and game menu data.
The primary data file referenced by The Elder Scrolls IV: Oblivion is named Oblivion and is located in the \Oblivion\Data folder. Custom ESM files can be viewed and edited using the Creation Kit or The Elder Scrolls Construction Set (TESCS).
NOTE: While ESM files are sometimes modified to create custom game mods, you can also use the .ESP format for adding game plugins.
You can see a list of software programs here on www.easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.