An nsg file extension is related to the Nessie NES emulator data format.
There is one other file type using
the NSG file extension!
.nsg - Lotus Notes database file
Detailed description
Software that open nsg file
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What is nsg file? How to open nsg files?
The nsg file extension is associated with the Nessie, an emulator of Nintendo Entertainment System, a video gaming console, available for Microsoft Windows.
The nsg file stores some kind of data used by Nessie.
The default software associated to open nsg file:
Nessie 
Company or developer:
Nessie Team
Nessie is a NES emulator for Windows. It can be used to play NES/Famicom games on PC.
Help how to open:
This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.
How to convert:
As far as we know, this .nsg file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.
List of software applications associated to the .nsg file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open nsg file, edit nsg file, convert nsg file, view nsg file, play nsg file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting nsg files.
Software that open nsg file - Nessie NES emulator data
Programs supporting the exension nsg on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Nessie for open nsg file action.
Unspecified and all other actions for computer programs working with nsg file - Nessie NES emulator data
Click on the software link for more information about Nessie. Nessie uses nsg file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
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