Either [0x00, 0x01, 0x03, ..., 0x0C, 0x0D, 0x0E] => Use Mixcrypt or [0x00, 0x00, 0x00, ..., 0x00, 0x00, 0x00] => Not encrypted
actual filecount
Offset of the filetable after the header: offset + GRFHeader.sizeof
Version of the GRF. Either 0x102, 0x103 or 0x200.
actual filecount = rawFilecount - seed - 7
Unknown
"Master of Magic"
Holds information that is present in all GRF files.