CAS File - opening and understanding

Did your computer fail to open a CAS file? We explain what they are used for and recommend software that we know can open or otherwise handle your .CAS files.

What is a CAS file?

A .CAS file is an Atari Cassette tape image file. These CAS files contain dumps software distributed on cassette tapes for the Atari, a computer system release in 1979. The CAS files can be loaded using an Atari emulator, making it possible to use old Atari software and games on modern computers.

How to open CAS files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension CAS for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 10 different CAS openers which you will find listed below.

Other file formats using extension .CAS

While Atari Cassette tape image is a popular type of CAS-file, we know of 10 different uses of the .CAS extension.

The CAS file extension indicates to your device which app can open the file. However, different apps may use the same file extension for different types of data. So a CAS opener may not be able to open all kinds of CAS files. In this case, look through all formats to make sure you find the best suited CAS viewer.

EACA Colour Genie Virtual Tape Image

These CAS files contain the image files of cassette tapes used in the EACA Colour Genie emulator, an emulator used to run software that was specific to the Colour Genie Z80 home computer. You can use these tape images in the EACA emulator and play old Colour Genie games on your modern PC.

While we have not verified the apps ourselves yet, our users have suggested 10 different CAS openers which you will find listed below.

EnCase Case data

These CAS files contain forensic images used by investigators to analyze user files. They try to find evidence such as internet history, pictures, and documents, to resolve court cases. This file is used in digital forensic processes, acquisition, analysis, and reporting.

While we have not verified the apps ourselves yet, our users have suggested 10 different CAS openers which you will find listed below.

Fluent case

These CAS files contain the general information of the problem and settings used in Fluent, a program used to perform numerical simulations and parallel computations. This is a read/write file so you can edit it using a single command line.

While we have not verified the apps ourselves yet, our users have suggested 10 different CAS openers which you will find listed below.

Frostbite Container of Assets

These CAS files contain the game data used in Frostbite, a cross-platform game engine.

While we have not verified the apps ourselves yet, our users have suggested 10 different CAS openers which you will find listed below.

Javelin Case study

These CAS files contain the worksheets created in Javelin, a data analysis program. Javelin is different from other spreadsheets because instead of building models based on data in cells, it uses objects called variables. Variables allow for flexible manipulation of the data tables, and you can perform multidimensional analysis. By using variables, Javelin gives users a way to see the logical roots and branches of each variable

While we have not verified the apps ourselves yet, our users have suggested 10 different CAS openers which you will find listed below.

M2000 tape image

These CAS files contain images of software sold on cassette tape for the Philips P2000, the first Philips home computer from the 1980s. M2000 is a Philips P2000 emulator that turns your PC into a P2000 computer, and you can run the old software by using these CAS files in the emulator.

While we have not verified the apps ourselves yet, our users have suggested 10 different CAS openers which you will find listed below.

MSX Cassette Tape Image

These CAS files are cassette tape image files containing the data of games sold on cassette tapes. You can use the BlueMSX emulator, an emulator for the MSX computer series, to run the CAS files' programs.

While we have not verified the apps ourselves yet, our users have suggested 10 different CAS openers which you will find listed below.

Quest Adventure

These CAS files contain a game project created in Quest, a game creation software that lets you make interactive text adventure games like Zork and The Hitchhiker's Guide to the Galaxy.

While we have not verified the apps ourselves yet, our users have suggested 10 different CAS openers which you will find listed below.

Sord M5 tape image

Through our analysis of CAS files, we know that one use of the format is Sord M5 tape image. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

While we have not verified the apps ourselves yet, our users have suggested 10 different CAS openers which you will find listed below.

Various viewers for this file format

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

GargoyleGargoyleUser submitted
QuestQuestUser submitted
TopSolidTopSolidUser submitted
SCASSCASUser submitted
Atari800Win PLusAtari800Win PLusUser submitted
wincasino2 Applicationwincasino2 ApplicationUser submitted
Source ControlSource ControlUser submitted
Dyalog APLDyalog APLUser submitted
CharacterFXCharacterFXUser submitted
wincasino Applicationwincasino ApplicationUser submitted
We have not verified any software that we know for certain will work with CAS-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with CAS-files. If you know one, please use the 'Suggest a program' link below and tell us about it!