A fun pack of well-designed levels. The levels start by exploring some of what Portal and Portal 2 didn't touch on so much in the core mechanics, and then proceeds to introduce a few new and interesting mechanics. There's the occasional chamber where the exit is hard to spot or where the puzzle hinges on an easily missed lever, but it's broadly good and makes you feel clever in the ways Portal should.

The story fits the setting quite well, but the moment-to-moment writing doesn't quite hit the mark. There's quite a bit of clunky exposition, and the jokes just don't land as well as they do in the main game. A few of the achievements made me chuckle, though, so it's not like it has *no* comedic chops.

As for length, my first playthrough clocked in at 4.2 hours. If I were to go through a second time to get the achievements I missed, that might bring it up to the advertised 8.

A fun pack of well-designed levels. The levels start by exploring some of what Portal and Portal 2 didn't touch on so much in the core mechanics, and then proceeds to introduce a few new and interesting mechanics. There's the occasional chamber where the exit is hard to spot or where the puzzle hinges on an easily missed lever, but it's broadly good and makes you feel clever in the ways Portal should. The story fits the setting quite well, but the moment-to-moment writing doesn't quite hit the mark. There's quite a bit of clunky exposition, and the jokes just don't land as well as they do in the main game. A few of the achievements made me chuckle, though, so it's not like it has *no* comedic chops. As for length, my first playthrough clocked in at 4.2 hours. If I were to go through a second time to get the achievements I missed, that might bring it up to the advertised 8.