Sylloc-Server started a few years back. Based on Stargate maps, playing on Half-Life 2 Deathmatch.
New Sylloc-Server (updated August 2015): 185.62.204.23:27015.
To have a constant updated server in your favourites, you might want to add ger24.fragnet.net:27015 to your list of servers instead of the static IP address.
Statistics can be found on the GameTracker website.