A post on the HL2world Forums outlines the fairly simple method for getting a Half-Life 2 deathmatch server (as opposed to Counter-Strike Source) running (thanks sauron). This is unsupported and certain aspects of this are a bit wonky, for instance, there doesn't seem to be a Gordon Freeman model for this purpose. Here is the sequence of console commands they've worked out:
All trademarks are properties of their respective owners.
News CGI copyright © 1999-2015 James "furn" Furness &
All rights reserved.
Chatbear v1.4.0/blue++: Page generated 26 April 2015, 20:39.