Does Project64 support etplay / multiplayer over LAN or Internet?
No, it was not implemented in the application due to time constraints and priorities. Perhaps some time in the (distant) future it may be. Some input plugins may provide netplay capability, but their are doubts about the potential quality of this form of implementation. A version of PJ64 called “Project64K”, based on the old v1.4 source and made by 3rd parties with Kaillera support, is available if you wish to try searching for it, but we do not support this sorry. We recommend getting people around one screen 😉 If you want netplay, you may wish to look for another emulator with proper built in online multiplayer support.