An alt file extension are used by Valve Steam program for Windows, Linux and Mac OS X systems.

There are 3 other file types using
the ALT file extension!

alt file icon.alt - Corel WordPerfect menu library file

alt file icon.alt - ReliaSoft ALTA related file

alt file icon.alt - Microsoft Dynamics AX temporary file

Detailed description

Software that works with alt file extension

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ALT file extension - Valve Steam file

What is alt file? How to open alt files?

File type specification:

Various data file type icon Various data file type

The alt file extension is associated with the Valve Steam, an application for Microsoft Windows, Apple Mac OS X and Linux, which enables users to download and purchase games from Steam service.

The alt file stores game history data used by Steam program.

The default software associated to alt file type:

Steam icon

Valve Corporation logo Steam  Microsoft Windows software

Company or developer:
  Valve Corporation

Steam is digital distribution and multiplayer platform. It is used to distribution of computer games, game updates and also has chat and in-game voices features. On Steam distribute many game developers, such as Electronic Arts, Activision, Bethesda Softworks, id Software etc. Steam is available for Microsoft Windows, Mac OS X and Playstation 3.

Help how to open ALT files:

Due the variability and uncertainty of this file type group, there is no general information available, about how to open this various data file format. However most files with extension from this group are usually not meant to be opened or viewed directly. If there are associated applications or programs listed below the extension description, you can always try to check their website for additional informations on their forums or other type of customer support.

For general information try to look at:
Identifying unknown file formats

How to convert file with extension ALT:

Due the variability and uncertainty of this file type group, there is no general information available, about how to convert this various data file format. However most files with extension from this group are usually not in formats, which can be converted. If there are associated applications or programs listed below the extension description, you can always try to check their website for additional informations on their forums or other type of customer support.

List of software applications associated to the .alt file extension

Recommended software programs are sorted by OS platform (Windows, Mac OS X etc.) and possible program actions
that can be done with the file
: like open alt file, edit alt file, convert alt file, view alt file, play alt 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 of the alt files.

  • Create alt file
  • Others alt file

Programs that can create alt file - Valve Steam file

Click on the link to get more information about listed programs for create alt file action.

Microsoft Windows:

Apple macOS / Mac OS X:

Linux/Unix:

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