CK3 file extension is for Game data iD/Apogee Commander Keen 3
Similar to CK3
A00 - Archive Section of a file distributed by archivesA01 - OzWin CompuServe E-mail/Forum Access SYSOP File
A01 - ARJ Multi-volume Compressed Archive
A10 - OzWin CompuServe E-mail/Forum Access SYSOP File
A11 - AIM Graphics file
A21 - Soundweb Firmware File
A2A - APLASCII EISPACK file
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