Typically located in C:\Users\ \AppData\Roaming\Sean OConnors Games\Firefight\Custom Maps\ or the main installation folder alongside Firefight.exe .

A folder (often named mod or the map's 4-letter code) containing subdirectories like Data , Images , or Sound that mirror the main game's directory structure.

A file named mod.txt is essential for the game to recognize the archive as a valid modification. It defines settings such as active nationalities, available equipment, and specific credit values for a scenario.