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Mesen logo.png
Current version: 0.6.0
Active: Yes
OS: Windows
Authors: Sour
Official website: Mesen
Source code: Source Code

Mesen is an open-source (GPLv3) NES (Famicom) emulator for Windows.



According to test ROMs, it is ranked as the most accurate NES emulator, slightly above puNES with a score of 99.4%.[1].

It has cycle-accurate emulation and offers numerous features, including:

  • Support for over 216 mappers[2]
  • FDS (Famicom Disk System) support
  • Video filters (xBRZ, NTSC, etc.)
  • Netplay
  • Debugging tools
  • NSF/NSFe support
  • VS Unisystem support
  • NTSC/PAL support
  • Overclocking
  • Video recording/playback
  • Custom palettes
  • Sound effects (fake stereo, reverb, etc.)