However, that's a lot to go with, so don't try and cram everything in. Going by the campaign, Aerial Faith Plates, Thermal Discouragement Beams and Hard Light Surfaces are the main test elements used throughout the theme.
And because of this theme's heavy use of entities that give the impression that everything is now alive, this theme is recommended for users with advanced knowledge of hammer. The levels are very dynamic, plenty of panels are present, fixing walls, floors, and ceilings they are used as test elements or just for decoration. This theme is supposed to gradually get cleaner, this gives the impression the facility is back to it's senses after a long sleep. So when making a map don't forget to get her talking. This theme takes all the good bits from the destroyed theme, and adds GLaDOS, everyone's favourite homicidal computer.
