GameSpot may get a commission from retail offers. Start by moving forward to the portal gun stand. The ground will break below you, causing you to fall into the waters below. Move forward up the short ...

As Wheatley confronts you with his spikes, fire a portal through the broken wall behind him. After a moment, white gel will begin dripping onto another surface. Fire a portal beneath the drips, and a ...

Continue into the next hall and press the red switch to open a section of wall, leading you to a large, open room beyond. There are many turret buddies guarding the room, and before you do anything ...

To get past the large chain-link wall in the next room, look for a lightly-colored surface on a very low-hung ceiling panel. Place a blue portal on that surface, then place an orange portal on the ...

Valve showed off the first gameplay footage of the Portal 2 coop mode, set to be one of the highlights of the game. The walkthrough video shows us glimpses of some of the new features and gameplay ...

The fan-made modification to Portal 2, called Portal: Revolution, gained popularity shortly after it was released. With over 40 new test chambers, there are naturally some that players find difficult ...

Follow the path, using your portals to pass the fence and rubble pile. When you reach the second fence, portal up to the platform behind it, in the upper-left side of your view. From there, drop down ...

Return to Aperture for further testing. Our Portal 2 Walkthrough provides a walkthrough for story mode, tips for co-op, and unlockables.