Portal/Chamber 06

An overview of the chamber.

Wall textures

You'll notice that from chamber 06 onwards, the walls have differing textures; some walls are dark brown, while others are the familiar light grey panelling. The textures on the walls show you where you can create portals; if you try to create a portal on a dark brown wall, it will fail. It is in this manner you are limited from now on in what you can do, so always look around for any potentially-useful light grey walls.

This chamber introduces the concept of pellets, pellet launchers and pellet receivers.

You must be careful around pellets though; as GLaDOS says, they're dangerous, and will instantly kill you if you touch them:

While safety is one of many Enrichment Center goals, the Aperture Science High-Energy Pellet, seen to the left of the chamber, can and has caused permanent disabilities, such as vaporization. Please be careful.

—GLaDOS

Transmission Received

The radio is above the pellet launcher, on the corner nearest to the entrance. Shoot a portal on the ceiling near it and grab the radio through the portal. Bring it to the exit lift.

27%

The portal necessary to redirect the pellet.

The objective here is to direct a pellet into the pellet receiver, which will then power the lift, enabling access to the chamberlock. Since there is a fixed orange portal end beneath the pellet launcher, it makes sense to put a portal above the pellet receiver, so that when pellets are launched, they go through the portal, and fly into the receiver. Notice that a red light is radiating out of the receiver, and this shows up on the ceiling directly above it. This can be used to accurately place a portal across from the pellet receiver. The pellet will fly through and be captured by the pellet receiver, which will then power the lift, allowing you to proceed to the next chamber.