Files with cm extension are used for CLEO. They contain custom missions for the game GTA:San Andreas.
There is one other file type using
the CM file extension!
.cm - Cable modem configuration
Detailed description
Software that open cm file
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CM file extension - Grand Theft Auto CLEO custom mission file
What is cm file? How to open cm files?
The cm file extension is associated with CLEO for Grand Theft Auto: San Andreas computer game which is developaed by Rockstar Games company. A *.cm file contains custom mission for GTA:SA.
The default software associated to open cm file:
Grand Theft Auto: San Andreas 
Company or developer:
Rockstar Games, Inc.
Grand Theft Auto: San Andreas is an action-adventure open world computer game developed and released by Rockstar in 2004. The game is set in the fictional state of San Andreas.
CLEO
Company or developer:
Seemann
CLEO is a software package with tools that offers the possibility of creating custom scripts for games from Grand Theft Auto series.
Help how to open:
Use CLEO program to open files with cm extension.
How to convert:
As far as we know, this .cm file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.
List of software applications associated to the .cm file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open cm file, edit cm file, convert cm file, view cm file, play cm file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting cm files.
Software that open cm file - Grand Theft Auto CLEO custom mission file
Programs supporting the exension cm on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about CLEO for open cm file action.
cm file editor and apps that can edit cm file - Grand Theft Auto CLEO custom mission file
Programs supporting the exension cm on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about CLEO for edit cm file action.
Programs that can create cm file - Grand Theft Auto CLEO custom mission file
Programs supporting the exension cm on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about CLEO for create cm file action.
Unspecified and all other actions for computer programs working with cm file - Grand Theft Auto CLEO custom mission file
Click on the software link for more information about Grand Theft Auto: San Andreas. Grand Theft Auto: San Andreas uses cm file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
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