OBND Multiplayer is a modification to the OpenBVE program that allows you to play online with other users. Right now this program is currently undergoing testing and needs people to join in order to test performance and other related game issues.
Interested in participating along with us in the livestream? Join the OBND Discord Server: https://discord.gg/Xfd7H9WfKp
If you want to participate you will need to follow an installation guide that is provided within the Discord server for the Multiplayer program.