We all know the story of when Chell awoke and defeated GlaDOS, but what about the story behind Aperture Science? This fan made sequel to Portal 2 tells the story of a new test subject in the 1950's and how they changed Aperture forever.
Portal - Origins features a new style of menu based around Aperture's style in the 1950's. This screenshot shows the Main Menu from Chapter One. Please note this screenshot shows an early menu and is not the final product.