Commander Keen 1 game data
File type: Game file
A ck1 file extension is related to the Commander Keen 1 an action platform computer game. A ck1 file stores game data.
Found 2 different file type records with the same ck1 filename suffix.
File type category:
Game file
Date updated: April 10, 2017
Record marked as obsolete and not updated for a long time.
The ck1 file extension is associated with the Commander Keen computer game series, originally created by id Software in 1990.
The *.ck1 files contain data of the second episode of Invasions of the Vorticons trilogy, called Marooned on Mars, also known as Commander Keen 1.
You can open and view the contents of .ck1 files with a small fanmade program called Mindbelt.
Software applications that can open ck1 files:
Microsoft MS-DOS
Software apps that create ck1 files:
Microsoft MS-DOS
Software applications that handle other tasks involving ck1 files:
Microsoft MS-DOS
File type category:
Various data file
Date updated: September 28, 2026
CARE-S uses the CK1 file extension for data describing total Kjeldahl nitrogen attached to sediment fraction 1 mass-concentration hydrographs. Total Kjeldahl nitrogen measures organic nitrogen and ammonia nitrogen in the modeled material.
The file is a supporting data file for CARE-S InfoWorks models and is normally handled as part of the associated model files.
Open the .ck1 file in CARE-S on Microsoft Windows. It is a supporting model file, so it may not display meaningful content when opened separately from the related CARE-S InfoWorks project.
The CK1 file is a supporting CARE-S model data file and should be kept with its associated model files. If you need the data in another format, use an export or reporting function in CARE-S, where available.
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