Destroyed (Portal 2)
This Portal 2 aesthetic theme, also known as "Clean Wheatley", is shown in co-op course 4. It is characterized by its exposure to the vast vistas of Aperture Science. Bottomless pits often, but don't always, replace the toxic water hazard found in most clean test chambers. Tests in this style should look like clean chambers which have been broken down, or, alternatively, have not finished being built yet. The vistas are of the so called "Behind the Scenes" areas: vents, walkways and other test chambers can be seen.
Aside from the destruction mentioned above, tests in this style should be similar to Clean tests. In terms of test elements, the co-op course uses primarily excursion funnels, but you don't have to restrain yourself to that that. Pretty much everything works in this theme.