Enter the test area and wait for GLADoS to give her speech and activate the laser.
Go stand on the panel just beneath the exit door.
Shoot a blue portal at the ground where the laser is firing, then shoot an orange portal at the ceiling above the laser target. The laser target is the circular object on the raised square.
The panel you’re on will raise up, allowing you to move through the exit door. Get into the elevator and head to the next test.
Use Space Bar to jump over the laser then go find the redirection cube in the corner of the room.
It’s blocked by debris so portal your way past the debris and grab the cube.
Hold the redirection cube in the path of the laser and use it to focus the laser at the target.
A staircase will form up to the exit door. Get up there and fire a blue portal under the cube. Now fire an orange portal on the ground next to you. Grab the cube when it comes through the portal.
Set the cube on the red button and head through the exit door. Grab an elevator to your next test.
The next test area will have a raised platform in the middle of the room. Put an orange portal on the ceiling above the platform and a blue one on the nearest wall. Then hop through.
Once on the raised platform, look for a redirect cube on another raised area. Jump and shoot a blue portal beneath it and the cube will fall through the same orange portal you fell through.
Now use the cube to direct the laser to the target.
Portal your way to the elevated area where the redirect cube came from.
There’s another laser shooting at a wall above you. Shoot a blue portal right where the laser is shooting and put an orange portal on the floor beneath the laser target.
The exit door will open and you can head to the next area.
Walk down the passage and you’ll find yourself on a platform above a pit of some kind of sludge.
To your right is a laser target. Put a blue portal on the wall directly opposite the target. Then put an orange portal on the wall that the laser is shooting at. A platform will begin to move.
When the platform gets in front of the red podium buttton, shoot an orange portal at the wall next to the podium. This will stop the platform.
Now hop through the blue portal and press the buzzer to grab a cube.
Put the cube on the platform, then jump up on the cube (this will prevent you from being struck by the laser).
Now fire an orange portal at the point where the laser strikes the wall. The platform will start moving again.
When the cube gets in front of the laser the platform will stop. Move the cube to the far side of the platform and it will start moving again.
Grab the cube and jump off the platform and onto the area where the red button is.
Put the cube on the button and you’re done with this one.
Exit the elevator and wait for GLADoS to clear the debris, then head through the door.
The next area has an aerial faith plate in the ground in front you. Step on it and you will be launched to the other side of the room.
Press the red podium button and a cube will fall onto an aerial faith plate in the middle of the room and start bouncing.
Step on your aerial faith plate just as the cube is at the bottom of its bounce and you’ll be able to snatch it out of the air with “E.”
Bring it back to the other side and set it on the red button. Then head through the door and you’re done.
In the next area step on the aerial faith plate. You’ll be bounced to two more faith plates. Try to orient yourself in the direction the black arrows on the faith plates are facing.
After you bounce off the third faith plate, there will be two angled panels in front of you. You’ll have to put a blue portal on one and an orange portal on the other while you’re in mid air. (If you fail, you can portal back to the faith plates and try again.)
After you shoot out of the portals, you’ll bounce off another plate and land on an area with a red podium button. Press the button.
Some trash will come shooting toward you. Press the podium button again and you’ll get a cube bouncing toward you. Stand in front of the cube, to keep it from flying off the edge.
Now face the podium button and look to the left. You’ll see a red button that needs a cube on it. Look at the ceiling above the red button, there’s a place to stick a portal. Throw a blue one on it.
Now turn around and put an orange portal on the wall behind you. Drop the cube through the orange portal and onto the button. The door will open and you’re good to go.
In the next test area, you’ll find your old friend the companion cube. Hop over the laser and grab the cube. It will instantly dissolve. GLADoS will give you another one which will disintegrate when you put it in the laser.
Finally, you can use the third companion cube to block the laser. This will cause an elevator platform to lower. Jump on it.
Now fire a portal underneath the companion cube and another on the wall. This will cause the cube to move out of the path of the laser and the elevator will take you up.
When the elevator stops you’ll see two angled panels. Throw a portal on one and get the cube up there with you.
Now plant a blue portal on the angled panel closest to the corner of the room. Put an orange portal on the floor of the lower level.
From the higher level, drop the cube through the portal on the lower level. Then jump through it yourself. You and the cube will land next to a red button.
Put the cube on the red button.
Now, place a blue portal on the other angled panel and jump through your orange one on the ground level. Move through the door to the next test area.
In the next area, some panels to the right will form steps that will take you up through an emancipation grid.
Fire a blue portal at the spot on the wall the laser is targeting, then fire an orange portal at the spot on the wall that is opposite the laser target (the laser target is beyond the emancipation grid).
There’s a red podium button on your side of the emancipation grid. Go push it and a redirect cube will appear on the other side of the emancipation grid.
Fire an orange portal through the hole by the podium, then put a blue one on the wall behind you to avoid the emancipation grid.
Grab the redirect cube and set it up so that it redirects the laser to the target. Now head to the next test area.