The file extension NES is associated with two different programs which include the iNES Nintendo Entertainment System or Nessus. iNES is a program related to Nintendo and the Famicom video game console and allows you to play NES games on a variety of different devices. Nessus is a vulnerability scanner which is used to conduct a security analysis of an enterprise network. The analysis includes configuration audits, intrusion detection, and monitoring of sensitive data.
NES files which are created by iNES Nintendo Entertainment System are an emulator file type that contains data and files related to emulation software used with gaming consoles. Emulation programs contain the same data as the original program to enable you to use NES emulators using a variety of operating systems.
NES files which are associated with Nessus are a source code file type that contains programming language created in ASCII plain text. The language can include C++, COBOL, DELPHI, C#, and many others which are used by developers for programs and applications. In the case of Nessus, NES files are used to create a vulnerability scanner program for corporate networks.
How to Open NES Files
Since NES files are associated with two different programs, double click on the file to see if it will automatically open in a default program you have installed on your PC. You may already have a program which will open the file.
If the NES file is an iNES ROM file and you use Windows, you can open it using iNES, which is an open source NES/Famicom emulator available as a free download on the KomKon website. You can also use VirtualNES, MESS, NesterJ or FCEUX to open NES files in Windows.
For Mac OS X, NES files associated with iNES can be opened using RockNES or Nestopia, which are open source applications available for download on the SourceForge website.
NES files that are classified as Nessus files can be opened using the Nessus network security program which is used with the Mac OS X platform. Since the files are source code written in ASCII plain text, you can open this type of NES file using any text editing program such as Notepad or WordPad for Windows, Apple TextEdit for Mac, or gEdit and Nano Editor for Linux.
NES files that are source code or script files can also be converted to another format using a file conversion program. There are a variety of file conversion programs available as a free download on websites such as CNET and Softpedia.