Valve the creators of instant classic games has DLC for their new title Portal 2. This year's highest rated multiplatform title was released April 19, 2011 and became a instant hit. Players can expect the new DLC will offer new test chambers, leaderboards, challenge modes for both single and multiplayer modes, and more. The new DLC is set to release this summer and will be offered free of charge for PC, Mac, Xbox 360, and PS3.
