Day of Defeat: Source Free Weekend

Valve has kicked off a free weekend of Day of Defeat: Source, which you can partake in simply by installing Steam and creating an account, if you haven't already done so. Day of Defeat is a team-based online shooter set in WWII which features goal-oriented missions based on historical operations. "This second free trial period features all the new content added to Day of Defeat: Source in the Summer Update, including the new gameplay type and missions." The event will end on Monday, July 10th, at 1:00 PM PST.