Valve has released some, anemic, details on the first batch of downloadable content for Portal 2, but what little has been said is exactly what we like to hear. “Portal 2 DLC #1″, as it is currently known, will be made available for free sometime this Summer, and will include leaderboards, a challenge mode across all campaigns, and new test chambers. Nothing else has been revealed, but expect Valve’s Portal 2 ARG habit to continue with the post-release content.