ESP File Documentation

Overview

Feature Value
File Extension .esp
Full Name Creation Engine Plugin File - Fallout 3
Type of File Game Data File
Format Binary
Developed by Bethesda Game Studios
MIME Type application/octet-stream
Platform PC / PlayStation / Xbox
Used by Fallout 3, Fallout: New Vegas
Purpose Modifications and Add-ons
Contains Data Overrides, New Content
Structure Records and Fields layout
Compatibility Requires Original Game Files
Can be Created With Creation Kit / GECK (Garden of Eden Creation Kit)
Editable Yes
Encryption No
Compression No, but can be packed into BSA files
Can be Merged Yes, with specific tools
Significance Extends game functionality and experience
File Hierarchy Can override base game files with proper load order
Common Tools for Manipulation Fallout Mod Manager, LOOT for load ordering