Some more Behind the Scenes themed areas, because apparently, I'm addicted to Portal 1's Aperture. The portal gun (conveniently placed at the Lobby) is required to access some parts of the map but overall, it's non-linear and doesn't have an ending. Feel free to explore for as long as you wish. To install, copy the .BSP in your portal/maps folder, launch the game and type 'map ApOfficesMore' in the console.