Steam News announces the release of Half-Life 2 deathmatch along with an updated software development kit for Valve's first-person shooter sequel. Here's the deal:

A Half-Life 2 update has been released via Steam. Please restart Steam to apply the update.

Included in this update:

Half-Life 2: Deathmatch
    • New multiplayer game featuring physics simulation system

Half-Life 2/Source SDK
    • Includes game code needed to create Half-Life 2/Source MODs
    • Ability to edit Half-Life 2 maps
    • Maya model exporter
    • 3d Studio Max model exporter source code
    • Sample MOD with vehicles

Source Updates
    • HTTP and non-HTTP map auto downloading functionality
    • Enhanced dedicated server logging capabilities
    • Various tweaks and fixes

*Also: A Half-Life 2: Deathmatch Map Making Contest has been announced. The winning entry will receive a cash prize of $5,000. Two runner up entries will receive a cash prize of $3,000.