Chapter 2 Cold Boot

Below you'll find full walkthrough videos with audio commentary. We put in Achievement / Trophy videos where they are relevant as well. Enjoy!

Portal 2 - Walkthrough: Chapter 2 The Cold Boot

Final Transmission Achievement / Trophy

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 the radio, backtrack through the level and place a portal on the pad across from the window. Use the launchers to get through the portal and into the room beyond the window with radio in hand. Once there, carry the radio up to the wall to receive the Final Transmission Achievement / Trophy.

Preservation of Mass Achievement / Trophy

Preservation of Mass can be completed in Chapter 2, Test Chamber 7. Keep track of the Companion Cube in this chamber and you can return to grab it at the end of the level after using it to depress the button. Ignoring GLadOS's admonishments and carry your pal through the broken "Emancipation Grill" at the end of the chamber to get this Achievement / Trophy.

Up Next: Chapter 3 The Return

In This Guide