.GEN File Extension
File Type 1ArcView ARC/INFO UnGenerate file
What is a GEN file?
Data file exported by ArcView, a GIS software program for visualizing and analyzing geographic data; contains information associated with an ArcInfo .E00 file.
NOTE: ArcView is part of the ESRI ArcGIS Desktop GIS software.
File Type 2Sega Genesis ROM
.GEN File Association 2
Game ROM used by Sega Genesis/Megadrive emulators; saves a copy of the contents of an original game cartridge and allows the game to be played on a PC with supporting emulation software, such as Kega Fusion or Genesis Plus.
The GEN file extension is interchangeable with the .SMD and .BIN file extensions, which are also used for Sega Genesis ROMs. However, since the ".bin" file extension is used for so many different file associations, sometimes the ".smd" and ".gen" extensions are preferred.