DEM File

What are DEM files and how to open them

Are you having problems opening a DEM file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a DEM file?

DEM files have multiple uses, and Build Engine Demo/replay Data is one of them. Read more about the other uses further down the page.

Build Engine Demo/replay Data

We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

How to open DEM files

Important: Different programs may use files with the DEM file extension for different purposes, so unless you are sure which format your DEM file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested ten different DEM openers which you will find listed below.

Last updated: December 8, 2022

More file formats using the DEM extension

Through our research of DEM files, we know that the following formats exist. However, we have not yet analyzed them in detail.

  • Half-Life Demo
  • IGO Digital Elevation Map
  • Vista Digital Elevation Map

Various apps that use files with this extension

These apps are known to open certain types of DEM files. Remember, different programs may use DEM files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Left DeadLeft DeadUser submitted
Scilab ApplicationScilab ApplicationUser submitted
VindictusVindictusUser submitted
Left4Dead2Left4Dead2User submitted
Left4deadLeft4deadUser submitted
Counter-Strike - SourceCounter-Strike - SourceUser submitted
Counter-Strike SourceCounter-Strike SourceUser submitted
PortalPortalUser submitted
TitanfallTitanfallUser submitted
Counter StrikeCounter StrikeUser submitted

Help us help others helps thousands of users every day, and we would love to hear from you if you have additional information about DEM file formats, example files, or compatible programs. Please use the links below or email us at to discuss further.