As promised, Valve has launched the anticipated "Day of Defeat: Source," an updated version of Day of Defeat running on the Half-Life 2 source engine. The game will be unlocked when you start or restart your Steam Client.

"DoD: Source takes the classic teamplay of DoD and expands the experience with Source, the engine technology Valve created for Half-Life® 2 and it's next generation of games. With this technology, DoD: Source offers state of the art graphics with optimized versions of popular maps and all new player, weapon and world models, plus support for HDR lighting.

DoD: Source leverages the power of the Source engine by introducing advanced sound technology to provide a more immersive soundscape and integrated physics simulation technology for ragdolls and physically simulated objects throughout each map.

Available via Steam for just $19.95 and in the Counter-Strike: Source retail package, DoD: Source is a rebuild from the ground up of Day of Defeat on the Source engine."