[img id='68977' txt='' align='left'> At the end of July there _ # We informed that he could try a beta tester for additional content for Portal 2, which would arrive by the summer and would offer a whole new co-op campaign, complete with a new story and set In the unsettling Aperture Science Lab , in addition to online leaderboards. Today, Doug Lombardi from Valve has officially announced the arrival of the first DLC, without giving any information about its contents, providing the period as a release date in mid-September.