Valve, creators of best-selling game franchises (Half-Life, Portal, Team Fortress, and Counter-Strike) and leading technologies (Steam and Source), today announced the sequel to its Zombie Photo Contest that ties into the out of home advertising campaign for its upcoming Xbox 360 and PC thriller, Left 4 Dead 2.

 Like last year’s contest, gamers are challenged to take a creative photograph of themselves in front of one of the outdoor media placements in New York, Chicago, Los Angeles, Seattle, Miami, Phoenix, Dallas, Minneapolis, and the San Francisco Bay Area. Contest rules and submission guidelines can be found at www.L4D.com/contest. All entries will be reviewed and judged by Gabe Newell, president and founder of Valve. The top 25 entrants will win a free copy of Left 4 Dead, and the overall winner will receive a custom engraved L4D2 Xbox 360.

 "Last year’s out of home media campaign proved to be one of the most effective vehicles for helping land Left 4 Dead on 2008’s top 10 seller list in the North America," said Doug Lombardi, vice president of marketing at Valve. "Valve has once again partnered with Gibson Media to execute the Left 4 Dead 2 out of home campaign and extend it to more markets across the US."