Attention -- the Aperture Science Enrichment Center cordially invites you back to experience its award-winning testing facility very soon on the Xbox Live Arcade. Play it again and for the first time with the complete original, 6 advanced maps and 14 new challenge maps. GamerScore Blog officially announced today that Portal: Still Alive will land on the marketplace on October 22. Unfortunately no price was revealed, which makes us think we're going to have to open the wallet wider than the average 800MS points. We can still dream, together.