File Extension Search

.mdl File Extension

Developer: Valve
File type: Half-Life Model File
You're here because you have a file that has a file extension ending in .mdl. Files with the file extension .mdl can only be launched by certain applications. It's possible that .mdl files are data files rather than documents or media, which means they're not meant to be viewed at all.

what is a .mdl file?

The MDL file extension was developed by Valve and used as Half-Life Model Files since they are the 3D models that are used in the Half-Life video game as characters and creatures. This is why MDL files are categorized as game files. These files are called 3D models because they contain the views, the textures and polygons of the game in3D. MDL files make use of different views to be seen and these views are flatshaded, textured, wireframe and smoothshaded. They are viewed with the use of the Half-Life Model Viewer. MDL files are also compiled with VTX files. These files are mostly used by Half Life, a first person shooter game wherein players play the role of Gordon Freeman, fighting their way out of a research facility that has gone wrong. Although MDL files are mainly used by Half Life, it is not only the half Life game itself that can open these files. Half-Life Model Viewer and MilkShape 3D as well as other applications can also open MDL files.

how to open a .mdl file?

Launch a .mdl file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .mdl file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .mdl files aren't yet associated with it. In this case, when you try to open a .mdl file, you can tell Windows which application is the correct one for that file. From then on, opening a  .mdl file will open the correct application. Click here to fix .mdl file association errors

applications that open a .mdl file

chUmbaLum sOft Half-Life Model Viewer

chUmbaLum sOft Half-Life Model Viewer

The Hal-Life Model viewer is developed to view models in .mdl, which is a Half-Life engine format. Models are seen with texture, a wire-frame and the viewer also has options for attachments and hit boxes. Users may also view the animation sequences of the model through the drop-down box in order to ensure that the model is working properly in the game. Models with multiple textures and multiple attachments are supported, with an option to make alterations or modifications in the texture of the model. It can stop animation playing, view the scale of mesh and the scale of bones. Mod developers are also able to view attachment points, select skin from skin families, view the model's chrome effect and change submodel for each available body part. It has a modified PAK viewer with recent PAK files, and allowed the importing of PAK models straight from the PAK files. The Half-Life Model Viewer also has fullscreen support, and has options for 3dfx with miniGL and user adjustable resolutions. Users may also change and load background color, load ground texture, and change ground color and light color. They may also make .tga screenshots.
Half-Life 2

Half-Life 2

Half-Life 2 of HL2 is video game program based on the first sequel Half-Life, which is created by Valve Corporation. This shooter type of game needs activation via the Internet for the first time, as it is designed with Source game engine powered by a Steam application which is also launched by the same company. It is an action-packed first shooter game, for both Windows and Mac computers, which entails a storyline providing realistic setting which makes playing enjoyable to users. Players are engaged to take the role as Gordon Freeman, who is a research scientist that must defend himself and the world he lives in against a group of enemies. There is one objective for each “chapter” (alternative to level or round) of the game which a player needs to complete and aim for in order to proceed to the next chapter. Success play of the game is evident after completing all the chapters. HL2 has improved graphic designs and animation plus high quality sound, including narration, and innovative physics.


GCFScape is an application that can open and extract GCF files used by Steam for storage of its game contents.GCFScape is required to open files with VPK format. When GCFScape is installed, you have to associate GCF files with GCFScape for them to be opened right away. The files will have icons when this step is done. Other supported formats by GCFScape are NCF, Half-Life BSP, PAK, WAD, VPK and XZP. GCFScape can validate all or part of GCF files. GCFScape can perform the following functions: File Mapping [by default], Quick File Mapping, Verbose Logging, Volatile Access and Write Access.


Developed by Valve Corporation, Akimbot is a multi-player bot software of Half-Life and Counter Strike, both are two first-person shooter video games. When you say bot software, it runs automated various tasks via the Internet. The question now is what this particular bot can do when you play Counter Strike or Half Life? There are a variety of tasks this bot software can do for a player. First, it buys new guns that can be useful in achieving the objective of every level or mission of the game. Another task this software can do is to buy shields and additional gears for maximum use of playing the game. Other than these, it also has the functionalities to generally fix and upgrade the game application. This also includes fixed dedicated server support. Some versions of Akimbot are compatible with Steam and CS 1.6, while others work for later or new versions of CS.

a word of warning

Be careful not to rename the extension on .mdl files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

what is a file extension?

A file extension is the set of three or four characters at the end of a filename; in this case, .mdl. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.

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