|We'll be seeing more of these two here soon.|
And more of GLaDOS!
This first pack will deliver a new test track for the co-op campaign, challenge modes for both single-player and co-op, as well as leaderboards for which to compare scores from the challenge modes in. Joystiq's got the press release posted in full if you're interested.
But the (second) best news out of this? The third part of the Portal 2 soundtrack is up for download! For free! Yay! So, what are you waiting for? Go get it!
Author's note: Somehow I mistook the 4th to be a Wednesday instead of a Tuesday like it actually is. My bad. It has now been fixed!