Editing Day of Defeat: Source (section)

===Marketing===
To promote the game, Valve has produced three [[machinima]] trailers depicting the game in play. The trailers are themed around wartime [[propaganda]] news reports for both Germany and the United States. To convey this effect, the trailers make extensive usage of the Source engine's capabilities for [[film grain]], [[color correction]], [[motion blur]] and [[depth of field]], as well as [[sepia toning]]. The first trailer was released as part of the game's post-release marketing on December 20, 2005. Entitled ''Prelude to Victory'', the trailer depicted a large firefight in the game as a report from the German perspective, complete with a commentator speaking in the [[German language]].<ref>{{cite video |date=December 20, 2005 |title=Day of Defeat: Prelude to Victory|url=http://www.steampowered.com/v/index.php?area=app&AppId=901&cc=GB |format=Streaming video |medium=Game trailer |publisher=[[Valve Corporation|Valve]] |access-date=June 10, 2008}}</ref> Two further trailers were released to promote the major update to ''Day of Defeat: Source'' in the second quarter of 2006. The trailers, both from the American viewpoint, displayed how the new detonation gameplay worked, emphasising teamwork as the key to success, as well as introducing the viewer to the two new maps added by the update.<ref>{{cite video |date=June 27, 2006 |title=Day of Defeat: Colmar|url=http://www.steampowered.com/v/index.php?area=app&AppId=918&cc=GB |format=Streaming video |medium=Game trailer |publisher=[[Valve Corporation|Valve]] |access-date=June 10, 2008}}</ref><ref>{{cite video |date=June 26, 2006 |title=Day of Defeat: Operation Jagd|url=http://www.steampowered.com/v/index.php?area=app&AppId=917&cc=GB |format=Streaming video |medium=Game trailer |publisher=[[Valve Corporation|Valve]] |access-date=June 10, 2008}}</ref> To further create interest in the game, Valve has opened ''Day of Defeat: Source'' to three free weekends, the first taking place on February 10, 2006,<ref>{{cite web|url=http://uk.pc.ign.com/articles/686/686592p1.html|title=Play ''Day of Defeat: Source'' For Free|date=February 7, 2006|website=[[IGN]]|first=David|last=Adams|access-date=June 9, 2008|archive-date=September 2, 2008|archive-url=https://web.archive.org/web/20080902102717/http://uk.pc.ign.com/articles/686/686592p1.html|url-status=live}}</ref> the second on July 8, 2006<ref>{{cite web|url=http://uk.gamespot.com/pc/action/dayofdefeatsource/news.html?sid=6153689&mode=recent |archive-url=https://archive.today/20120716235249/http://uk.gamespot.com/pc/action/dayofdefeatsource/news.html?sid=6153689&mode=recent |url-status=dead |archive-date=July 16, 2012 |title=More free ''Day of Defeat'' |website=[[GameSpot]] |date=July 8, 2006 |access-date=June 9, 2008 }}</ref> and the third on July 4, 2008,<ref>{{cite web|url=http://storefront.steampowered.com/Steam/Marketing/message/1671/|title=''Day of Defeat: Source'': The Palermo Update – Free Weekend|publisher=[[Valve Corporation|Valve]]|date=July 2, 2008|access-date=July 3, 2008|archive-date=December 11, 2008|archive-url=https://web.archive.org/web/20081211091403/http://storefront.steampowered.com/Steam/Marketing/message/1671/|url-status=live}}</ref> where anyone with a [[Steam (service)|Steam]] account could download and play the game for a maximum of 48 hours free of charge.