Beginner's Guide to Multiplayer

From Rigs of Rods Wiki

To connect to a multiplayer server, open the configurator.

1. Click on the network tab.
2. Check Enable network mode and enter your nickname.
3. Go to your profile on the RoR forum and find your User Token. Keep this for yourself. Do not share it. Otherwise other people are able to imposter you. And copy/write it to the User Token.
4. Click on Update to show the server list.
5. Click on one of the servers
6. Click Save and Play.

The game will start, and you will be allowed to choose a truck. Once you've made your choice, you will begin gameplay. After this point, you will not be able to change trucks unless you restart the game. Press the enter key to chat.

Notice - As of the latest few versions of 0.36.3, the Y key is used to chat, not enter. Enter is only used to send chat by default.