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Source Engine SDK Adds Orange Box SupportSubmitted by: OtakuMark @ 09:33 AM | Thursday, November 8, 2007 | (url: http://www.shackn...)The release unlocks content and adds tools that will allow users to create maps, models, and textures for Half-Life 2: Episode Two, Portal, and Team Fortress 2. Category: PC Gaming | 2 CommentsTags: half.life.2 portal source source.sdk steam team.fortress.2 valve |



