This repository is an archive of Mesen as it was around version 2.1.1 in mid-2025.
For the latest version of Mesen, see here: https://github.com/nesdev-org/MesenCE

Mesen is a multi-system emulator (NES, SNES, Game Boy, Game Boy Advance, PC Engine, SMS/Game Gear, WonderSwan) for Windows, Linux and macOS.

The latest stable version is available from the releases on GitHub.

These builds don't require .NET to be installed.

• Windows 10 / 11
• Linux x64 (requires SDL2)
• macOS - Intel (requires SDL2)
• macOS - Apple Silicon (requires SDL2)

These builds require .NET 8 to be installed (except the Windows 7 build which requires .NET 6).
For Linux and macOS, SDL2 must also be installed.

• Windows 7 / 8 (.NET 6)
• Linux x64 - AppImage
• Linux ARM64
• Linux ARM64 - AppImage

Other builds are also available in the Actions tab.

SteamOS: See SteamOS.md

See COMPILING.md

Mesen is available under the GPL V3 license. Full text here: http://www.gnu.org/licenses/gpl-3.0.en.html

Copyright (C) 2014-2025 Sour

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.