Valve and the Day of Defeat team today announced an official partnership for continued development of the World War II-based Half-Life MOD. In addition, Day of Defeat 3.0 is due to launch next week, and will mark the introduction of new missions and gameplay types, a new player class, and more. First shown at the Third Annual Half-Life MOD Expo in San Francisco late last year, Day of Defeat is a team-based action game based upon the great battles, equipment, and scenarios of WWII. For more information, visit the Day Of Defeat Mod Site.