Look across the large room for a landing just past the fire pit. Launch a blue portal onto the wall over the landing, then place an orange portal onto the wall to the right, positioned slightly ...

They’ve got you out gunned. Turrets are introduced in Portal 2 in Test Chamber 13 during Chapter 3, but it’s not until Test Chamber 15 that they truly start to be recognized as the threats ...

Got it? Good! Let's get to it. Portal 2 is divided into chapters, which are divided into test chambers and other segments, and so is this guide, naturally. You can use the navigation below to find ...

To prepare you for the game's later stages, where you'll be combining each and every mechanic Portal 2 has ... The test begins with a dramatic set piece as Wheatley wedges two chambers together.

Valve have been been quite good with DLC and user-created content, and Portal 2 from what it seems ... to find and play the community-generated test chambers. Valve have not been sitting on ...

The Portal 2 Test Chamber editor DLC is now available, fire up Steam and you’ll be able to update it right away. The DLC also contains new Cave Johnson dialog, as seen in the video above.

Simply fire a blue portal through the mess of pistons and onto the wall behind them, then pass through a nearby orange portal to bypass the hazard. Next up is a set of two larger pistons.

After your surprise, enter the chamber and portal across the gap to the platform behind the turret. You'll find a button which releases two Redirection Cubes which collide and fall into the goo.

Most of those who've made it through to the end of Valve's brilliant sequel will have encountered at least one test chamber whose ... the solution in Portal 2 is always staring you in the face.