Chamber 16

Your expert guide to conquering Portal 2's Chapter 8, Chamber 16. Learn the quickest way to navigate this complex chamber and move on to the final chapter!

Alright, welcome to Chamber 16! This is the last real chamber for this chapter, and yeah, it's a bit of a brain-tickler, but nothing we can't handle. Once we're through this, it's on to the final chapter!

So, first things first, as you approach the main area, the path ahead is going to collapse. Don't panic! You'll see some blue Conversion Gel nearby. Use that to get across the gap.

Now, from where you land, use your portals to zip over to the blue gel dispenser on the far side of the room. Once you're there, position your transportation beam so it shoots through the back wall (right under that dispenser) and then across the pit. Hit the plunger to start the gel flow. As soon as the gel passes the grating right by your feet, cancel the beam. This will coat the floor with the blue gel.

Next, reinstate the beam, hit the plunger again, and then use that blue gel to bounce yourself right up into the beam. Once you're safely over the chasm, jump out of the beam. You'll land near a red switch. Stand on it to reverse the beam's direction. Keep standing there until the gel has traveled through both portals and is heading towards the transportation beam device itself. While you're waiting, take a look to your right – you'll see three turrets behind some glass, and a square light panel above and to their left. Keep that in mind.

Okay, here's the tricky part. Once the blue gel is getting close to the beam device, step off the switch. This will send the gel forwards again. Immediately – and I mean quickly – place an exit portal on the left-hand wall, near those turrets. The beam and the gel should now be passing right over their heads.

When the gel is about three-quarters of the way over the turrets, cancel the beam. The gel will fall straight down, taking out all three turrets. Now you can safely walk over to the button on the other side of the glass and hit it. This will reveal a slanted wall panel near where you first entered the room.

For the final move: place a transportation portal on the floor near the entrance. As you rise towards the ceiling, keep your sights locked onto that slanted wall panel. Once you reach the top, get rid of the beam. You'll drop through the panel, over the glass, and the speed you gain will launch you right into the blue gel and straight to the exit! You did it!