<http://schema.org/description>
"Valve brings its signature humor to the upcoming 'Portal 2' Perpetual Testing Initiative map editor DLC."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/gaming/portal/news/a380662/portal-2-perpetual-testing-initiative-dlc-out-now-game-on-sale/>