We've now added support for Defence Alliance 2 servers
and Mare Nostrum servers
. DA2 is a mod of Killing Floor that Tripwire says is a ".. futuristic team based multiplayer mod [that] has been described as a combination of Halo/COD/TF2" and Mare Nostrum is a mod for Red Orchestra Ostfront 41-45, based in the North African theatre of war.
We've also put up a few test servers: