There are a lot of new puzzle mechanics that are added in Portal 2 that up the ante in terms of how complex the series’ puzzles can be. Hard Light Bridges are introduced in the early hours of the game ...

As players enter Chapter 7 of Portal 2, they begin to really start feeling a spike in puzzle difficulty thanks to the sparsely populated test chambers of old Aperture. Due to the dilapidated aesthetic ...

Final Transmission can be found in Chapter 2, Test Chamber 6. You need to carry a radio -- which shows up in a clump of garbage after you hit a button -- into a window above the chamber. After you get ...