Home : File Types : DEM File (2 File Associations)

.DEM File Extension

File Type 1Video Game Demo File

4.3 (200 Votes)
CategoryGame Files


This file is saved in a binary format, which requires a specific program to read its contents.

What is a DEM file?

A DEM file is a game replay file created by various first-person shooter games and most popularly by Counter-Strike (supported by Valve's Source game engine). DEM files are used to record a player's perspective in a single or multiplayer game, which can then be shared with others.

More Information

To play a Counter-Strike DEM file in Windows, first place it in the cstrike\ installation directory. Next, start Counter-Strike and open the console window. From the console window, type viewdemo demoname, where "demoname" is the filename without the ".dem" extension.

DEM files are also used by Hexen II, Quake, and Unreal Tournament. However, the files are only playable on the game for which the demo was created.

NOTE: DEM files created by Source engine games, such as Counter-Strike, can be opened in VirtualDub to play the video frame sequence and record it to other output formats, such as .AVI. There is a size limitation of 2 GB for AVI videos created by Valve's source engine. You can install the Apple QuickTime component to encode the .H264 codec in order to avoid the size limitation.

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Programs that open DEM files
Valve Counter-Strike
Epic Games Unreal Tournament
id Software Quake
id Software Hexen 2
Valve Counter-Strike
Epic Games Unreal Tournament
id Software Quake
Updated 6/3/2016

File Type 2Digital Elevation Model

3.8 (42 Votes)
CategoryGIS Files


File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

.DEM File Association 2

Contains mapping data with elevation information; used by the US Geological Survey.

Programs that open DEM files
ESRI ArcGIS for Desktop
Golden Software Voxler
TatukGIS Viewer
MicroMouse AccuTrans 3D
Updated 5/18/2012

About the file extension dem

Our goal is to help you understand what a file with a *.dem suffix is and how to open it.

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