For advanced Half-Life server management, check out Rob Abbott’s Halfd.

Also check out Admin Mod, another great server tool.

The CLQ or, Champions League for Quake, ranks multiplayer performance for a slew of first-person shooters including Half-Life and various mods.

Forget the binds, and tau nonsense and join the Bubblemod, a server-side modification that addresses l33t excess.

The latest news on modifications and other Half-Life developments and an extensive network of co-hosted sites of all flavors.

A clan for the elderly in Half-Life years and personal friends of Chumpland.

Home of some of the best custom HL and Op4 maps, courtesy of Quantum Saint and Gun Sgt Hartman.

Excellent Half-Life related interviews and articles, Trepidation Software is also at work on a Half-Life werewolf mod.

Visit our realtime status page of popular Op4 servers, courtesy of ServerSpy.