COS File Type

- The quick facts

What are COS files and how to open them

Are you having problems opening a COS file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a COS file?

A .COS file is a WinArcadia Saved State file.

We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

How to open COS files

Important: Different programs may use files with the COS file extension for different purposes, so unless you are sure which format your COS file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested 4 different COS openers which you will find listed below.

Last updated: April 15, 2016

Suggest another file format using extension COS

While we know of one file format using the .COS file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .COS file.

Various apps that use files with this extension

These apps are known to open certain types of COS files. Remember, different programs may use COS files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Command OpsCommand OpsUser submitted
Scenario MakerScenario MakerUser submitted
Cot Cot CothelloCot Cot CothelloUser submitted
ComptanooComptanooUser submitted