Valve's summer DLC still on track, just about.
Valve has revealed that the free DLC for Portal 2, announced back in April, will be released in mid-September - just about sticking to the company's announced summer release date.
According to Valve's Doug Lombardi, speaking to Kotaku, that's "still technically summer".
The content will include new test chambers and a challenge mode which supports both single-player and co-op modes. The pack will also include leaderboard support.