It is a non-linear map which have many paths to take and reach the end. The point is, that you play a map one time and you are happy. Then you have a little break in Portal, because there aren't any new released maps for some time. But the answer is here: play the Deja-Vu again, but choose a different path with different puzzles. You can choose freely the way that is going to lead you to the end. Thats it!
Screenshots
(view original)
Post a comment
Description
random
It cant be so easy :P .
It is probably a trap door that leads to a huge test chamber that is almost impossible to beat, and then you find a huge spiraling stairway that leads back up to the top (although very slowly) and then you fall through another trap door that takes you to the room with GLaDOS, and once you defeat GLaDOS, you fall though a third trapdoor and finally get the cake.