Valve have sent out official word on their upcoming DLC for Portal 2, efficiently naming it Portal 2 DLC #1 for now.
The pack, which is coming to PS3, 360 and PC, offers new single and multiplayer test chambers as well as leaderboards and challenge modes. We’re super happy to learn that co-op modes will be expanded upon in this pack, but we’re even happier to learn that the whole thing will be free.
Release dates point towards summer, which is a little vague. Hopefully we’re looking at the earlier half, say around June or July time.