If you want to join the server search for a server named "The Cohhilition", and join with the password "cohh".
If you have never heard of this game, you should give it a try. Your challenge is to get a company up and running with busses, trains, ships, and airplanes. You transport people, goods, mail, wood, corn.... to other factories and cities.
You can download it for free at http://www.openttd.org/
Server rules:
- Following the official rules: https://wiki.openttd.org/Multiplayer_Rules