The server has now been updated to the full game version. It's running on exactly the same information, which means the demo server is now gone.
The server has some issues with connecting, but a fair few of us managed to join consistently today, and it seems fine coop!
Edit - a little more info!
The Steam Groups server still isn't working properly, so to connect, either add it as a favourite or directly connect. I personally suggest adding it as a favourite:
- In options, ensure that you can bring up the developer console.
- Bring it up and type "openserverbrowser" (or something like that beginning with open; it will auto-complete the rest for you).
- Go to favourites.
- Enter the address, promethius.thahavennet.org.uk and click the "Find servers at this address"
- The TF2 server and LFD server should show up in the list. Click the LFD one.
- This should then be added to your favourites.
To join, merely open the server browser, go to favourites and double click the THN server. A password box should come up. Type in "thn" in lower case and click connect. Now, usually, when I do this, a second password box will appear BEHIND the server browser and developer console. Merely more the server browser so you can see it, and click ok (the password will be the same as the one you typed into the previous box). Or wait until someone else is on it, and join them. Again, issues with this. Use the Steam Friends chat window thingy to join people on the server, as the ingame one seems to have issues, and connects you to random games.
This is a bit stupid, and obviously we'll be looking into getting the Steam Groups server bit working. Enjoy!