File extension g64 is used by following file type(s):

File extension g64 file type 1 description:
C64 emulator disk image file

The G64 file extension is associated with emulators of Commodore 64 legendary 8-bit computer sold in 80's and early 90's. File contains disk image captured from C64 diskettes or hard drives. It can be opened, or mounted in the Vice C64 emulator etc.

Programs
that open g64 files:
VICE (Microsoft Windows)

 

File extension g64 file type 2 description:
Security camera video file

The g64 file extension is associated with the video file format used by various security cameras to store captured video data. The .g64 video files can be played in the Omnicast software video player for Windows.

Programs
that open g64 files:
Omnicast (Microsoft Windows)