Amazing mod, exactly the difficulty I wanted in a Portal game. Hard enough to get stuck for quite some time but always managing to make it in the end. The story and humor try to be very similar to Portal 2, maybe a bit too much, but people play that kind of games for the gameplay anyway and here it's Portal 2 and it's mechanics perfected to an ideal difficulty. It does add a bit to the story of what happens at Aperture, although I assume non of it is canon.
I've often read it would be the closest thing we got to a "Portal 3", I'd call it more a Portal 2 : Episode 1.
Good review of the game : https://www.youtube.com/watch?v=_9ovEGOr40M

Amazing mod, exactly the difficulty I wanted in a Portal game. Hard enough to get stuck for quite some time but always managing to make it in the end. The story and humor try to be very similar to Portal 2, maybe a bit too much, but people play that kind of games for the gameplay anyway and here it's Portal 2 and it's mechanics perfected to an ideal difficulty. It does add a bit to the story of what happens at Aperture, although I assume non of it is canon. I've often read it would be the closest thing we got to a "Portal 3", I'd call it more a Portal 2 : Episode 1. Good review of the game : https://www.youtube.com/watch?v=_9ovEGOr40M