Forward port 7777 on your router (in case you have never done this before, neither have I. Just look up your router's I.P by the manufacturer, log in and find it in the menu.. it was super easy)
Download http://www.tunngle.net/index.php?l=en (Both you and your friend will need it)
When you both have tunngle running, join the Hunted: The Demon's Forge network/channel in Tunngle (it will take a second to load)
Have whomever forwarded the ports (the host) "host lan game"
Get your friend who will join you, go into "join LAN game"
The host name should be there, click them and join up!
This took ages for us to figure out, since we tried everything possible (himachi, game ranger, port forwarding, him host me host etc.. ) I really hope tis might be of some use to you guys!