Project64 is a free and open-source Nintendo 64 emulator written in the programming languages C and C++ for Microsoft Windows. This software uses a plug-in system allowing third-party groups to use their own plug-ins to implement specific components. Project64 can play Nintendo 64 games on a computer reading ROM images, either dumped from the read-only memory of a Nintendo 64 ROM cartridge or created directly on the computer as homebrew.
Project64 was considered one of the top performing emulators and the most popular Nintendo 64 emulator in 2013. The program is licensed under the GNU General Public License version 2.