All the while, you’re forced to solve a range of new test chambers using the Quantum Cube.
It can be powered by and used to redirect lasers.
Continue along the wall and thengo up the rail steps.
Go through the door and continue walking until you have toput the Blue Personality Sphere on a rail.
Shoot a portal through the broken glassand thenshoot another on the wall next to you.
Go through andwait for the exit door to unlockto pop fire up path to the elevator.
Quantum Cube Introduction
Go up the stairs andcontinue walking through two circular doors.
Take the cube through andaim it at the input to pop swing open the exitdoor.
Go through and then through the next door toenter the next testing chamber.
In the room,take a left through the energy field.
Shoot a portalon the wallin front of youandone by the Quantum Cube.
Bring it through the portal andput it under the laser,aiming it at the inputon this side.
Use portals again to get across the water.
If you hold the Quantum Cube,it should correct itselfto where thelaser output is pointing away from you.
Even when it’s not powered on, use this to aim ahead of time.
In the next chamber,drop and shoot one color portal at the end of the laser.
Next, take the first Quantum Cube and put itbehind the first light sensor.
Shoot aportal where the laser pointsand the otherportal in front of the light sensorsso they’re powered on.
Then, take one of theQuantum Cubesand put itat the end of the lightsensor path.
Use the other Cube to power the exit door.
Go through andget on the elevatorto end this section.
Quantum Cube Reinforcement
Continue along the available path to enter the next test chamber.
Next, take the other Quantum Cube near theother sensor on the lower level and power it.
After that,use portals to get backto where you started.
Goacross the light bridgeandstep on the launch padto move to the upper level.
Go through, pick up the cube, and go back.
Place the cubeunder the laser to power up the cube on the platformbelow.
Once there, shoot aportal into the darkened spots in the wallsanduse the small buttonto release two Quantum Cubes.
Place oneunder the laserandone aiming through the lower portal, with the higher portal hitting the sensor.
Next, go near the launcher on the lower level andshoot a portal on both slanted walls.
Step on the launcher to send yourself through both.
There aremere secondsto shoot the portals, so don’t feel bad if this takes multiple attempts.
On the second level,shoot a portal near youandnear the cube.
Go through,grab the cube, and thenuse the laser to destroy the line of turretsthrough the window.
Then,aim it through the inputto power the exit door and leave.
Get on the elevator to end the section.
Quantum Cube Examination
Go through the circular door and into the test chamber.
Once inside,shoot a portal on the highest wallto your right and thenstep on the launcher.
Before you landon the middle platform,shoot the other colorso that you’re launched through.
After you’ve landed, press the button andplace the second portal under the blue geldispenser.
After that,use two portals to return towhere you started.
After both are activated, use a portal to get back to the starting area.
Shoot aportal under the dispenserandone on the high wall near where you started.
Press the button tosend gel throughand into the vacuum.
The blue gel willcoat the middle platform, making it bouncy.
Next,pick up the Quantum Cubeandput it in the Vacuum Tube.
Return to the beginning using portals andstep on the launcher.
This time, you’ll go through the tube and bounce on the middle platform.
