Open 999 file
Did your computer fail to open 999 file? We explain what 999 files are and recommend software that we know can open your 999 files.
What is 999 file?
Files with 999 file extension are used by Sega games to make backup.
999 file description
The 999 file extension is or was used by some Sage applications for their backup files. This type of backup was used on the old Sega games and there is no more information about this file.