.ESF File

File extension esf is also used in the Total War series of strategy games from Creative Assembly.

This type of esf files contains preset settings for individual campaigns.

For example in Total War: Rome 2, the main campaign file - found as startpos.esf - can be found inside the  Rome II installation directory]\data\campaigns\main_rome subfolder.

Files with esf extension can also be found as campaign settings for Total War strategy games.

How to open:

You can edit these files using EditSF program or similar other editing tools to change the starting parameters of new campaigns.

How to convert:

You cannot convert these files to anything else.