The HCF file extension stands for Compact Ham Library. HCF files are used by the HAM Runtime program to run .HAM and .EHAM executable files. These compact library files can contain HAM and EHAM files along with additional data like md5 checksums, developer information, and other program details.
HCF files are edited using the HCF Edit tool included with the HAM Runtime software. The HAM Runtime program and file format were developed by Zaplots Games, Inc. The description and full syntax of the HCF file format is not yet publicly available.
HCF files can be found on all platforms including mobile, but compatibility varies. Issues opening HCF files may be due to unsupported file types or needing an updated application version. There are over 1200 file types using the HCF extension, so the correct program is needed for each file type to avoid compatibility problems.