Portal 2 DLC will be Free.
Earlier this week, Valve marketing director Doug Lombardi revealed that the company's recently released Portal 2 would be getting its first batch of downloadable content this summer. Today the developer gave a few details on the DLC, most notably that it would be free of charge to all players.
The first Portal 2 DLC pack will feature new test chambers, as well as single-player and cooperative multiplayer challenge modes. The pack will also add leaderboards, and be available for the Xbox 360, PlayStation 3, PC, and Mac versions of the game.