Files with dgn extension are associated with emulator files used by Dragon 32 emulator.
There is one other file type using
the DGN file extension!
.dgn - MicroStation drawing [common]
DGN file extension - Dragon 32 emulator file
What is dgn file? How to open dgn files?
File type specification:
The dgn file extension was also used for emulator files in Dragon 32 emulator that was around the year 93-94. Most likely a very old file format and no longer in use.