<http://schema.org/description>
"Not killed enough undead monstrosities this Christmas? Let Valve fix that for you. Left 4 Dead 2 is now free on Steam. In case you&amp;#39;ve missed it thus far, Left 4 Dead is blooming brilliant. You and up to three human buddies fight through 90 minute missions set in different zombie-infested locales across America. The zombie throngs are managed by an AI director, which measures your health and"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.pcgamer.com/left-4-dead-2-is-free-on-steam-until-tomorrow/>