Day of Defeat: Source
Game Description
With the Source engine's modularity and the Steam platform's distribution technology, Day of Defeat offers many technologies that had not yet been seen in games upon its release. Day of Defeat: Source was the first game implemented with their new High Dynamic Range lighting (Counter-Strike: Source, Half-Life 2: Lost Coast, and Half-Life 2: Episode One have since implemented it). Other technologies added post-release include effects Valve are to add to the game to make it look closer to a World War II era film. The effects include motion blur, depth of field, film grain and color correction. Some of this technology is meant to convey period cinema, while others were meant to simulate how the human eye works (High Dynamic Range is an example of this).