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Navigation: Home > FOS file

Informations about the FOS filename extension and the file formats associated with it

We collected the information you should know about the .fos filename on this page. If you were sent a(n) .fos file in an e-mail, but you don’t know what to do with it, then you can find help here. We strive to suggest free, open-source applications that are available to everyone for the file formats.

1 filename extension(s) are in our database

.fos - Fallout 3 Saved Game

The FOS file is a Game Data file, which is connected to the Fallout 3 Saved Game according to our registry. With the adequate settings, the Fallout 3 Saved Game (.fos) files can be opened or converted with the help of Fallout 3.

Format description:
FOS format description not yet available
Game Data
Fallout 3
Magic string:
- / -
Related links:
Related extensions:
Fallout 3 Bethesda Softworks Archive

Important! Programs other than the ones listed above may also use the .fos file extension. Even harmful programs can create files with the .fos extension to store data in them. Always be careful with .fos files coming from unknown sources. Don’t open executable files that arrived in mails, even if you know the sender.

The .fos file can’t be opened on your computer?

If the program necessary for opening the .fos file is installed properly on your computer, then the quickest and simplest way to open the .fos file is to double-click on the file’s name. If that doesn’t work, then the right software probably isn’t installed on your computer.

While opening the .fos file, you may receive an error message from the associated application, this can be caused by the following:

Incorrectly given .fos extension

The .fos filename extension can be given incorrectly sometimes. The cause of the error could be a mistake or a simple typo. We found the following incorrectly given filename extensions that are the most frequent in the case of .fos files.

bos, tos, os, fso, fps, fow, fo, fis, cos, vos, ros, ofs, fs, fox, foc

Maybe you’re not even looking for the .fos file extension?

It’s possible the the file’s extension was given incorrectly. Below, we list some filename extensions that are similar to the .fos extension. It’s possible that the one you’re looking for is among them.

Fallout Tactics: Brotherhood of Steel Data
Adobe Flash Media Server Remote Shared Object
InfoZoom Table
Creator Fault List File
XSL-FO Formatted Form
Capture One Settings

Associated applications

The Windows operating system stores information about the applications associated to the file extensions in the registry database. The associations can be queried or modified in the Command Prompt window with the "assoc" command.

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We gladly accept application suggestions, but our primary goal is to suggest reliable, open-source applications that can be freely distributed to the users.

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