File Extension Library


.CK5 File Extension

  • Developer by: id Software LLC
  • Category: Game Files

What are .CK5 files and how to open them?

Can't open .CK5 file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .CK5 file.

What is a .CK5 file extension?

.CK5 file extension is created by id Software LLC. .CK5 has been classified as Game Files.

.CK5 is Commander Keen 5 game data

The CK5 file extension is associated with the Commander Keen computer game series, originally created by id Software in 1990.

The .ck5 files contain data of the second episode of the second series Goodbye Galaxy!, called The Armageddon Machine, also known as Commander Keen 5.

.CK5 file format is deprecated and this file format is no longer supported.

Currently, .CK5 file type is not actively used and is obsolete. This usually happens with system files in older operating systems, files from long-discontinued software, or with previous versions of some file types (documents, projects, images, etc.) that were replaced in later versions of the original programs.


How to open:

Use TED5 to edit game data from Commander Keen 5.

How to convert:

As far as we know, this .ck5 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.

How to fix problems with .CK5 files

  1. You need to update the application that you normally use to open .CK5 files. Only the latest version of the software supports the current .CK5 file format
  2. You need to check the .CK5 file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)