My team and I are creating an (epic) map pack.
I't will be way different than any other map pack you will have ever seen, for example there will be no GLaDOS but MARIS (Modular Assessment Recording Interface System) Guiding you through the test chambers until it takes a turn in a bad way. But someone from the inside is helping you out ;) So finish those puzzles, escape, fight an epic new never-seen-before boss and escape again using your portal gun.
Please note that you can't download this map pack yet I'ts still in development but be sure to sign up for the beta to make sure you will be the first to play Portal Stories. http://portalstories.wordpress.com/beta-signups/
Cheers! and I hope to see you again in the Beta testing!