We are now on the fourth floor with this Portal 2 Walkthrough chapter. The Portal 2 Walkthrough player then starts by dropping down and moving across the broken steps to reach through the island on the right. When you arrive, look at the far right pillar from the water and put your portal at the top of it. Continue moving to any of the pillars and fire an orange portal to reach the top. From there, face to the left and put your orange portal to enable access on the following room. The switch just right in front of you will release a blue gel that will stick on the walls and on the floor. You then put your blue portal on the left far corner nearby the upper level. Then fire your blue portal at the small white wall on the upper level.
The Portal 2 Walkthrough player then continues upon reaching the third level, turn back around and put the blue portal at the wall just below you so that the ground also is then covered with the gel. Lastly, put your portal on the ground just under the grill ahead. Then just wait for the blue gel to fly above the portal then quickly remove your portal so that the goo can spread down all over the ground. With two of the floors covered with gel, bounce then forward and jump unto the grill. Because the grill would nuke the old portals, get around to the left and change your lost orange portal just below the gel dispenser. Place your blue portal on the inclined platform unto the left so send more goos flying up to the third level. And then lastly, put your orange portal down just below and jump into it. For as long as the gel is on the right spot, the impulse of the wall will be enough to bring you to the elevator for the next floor of the Portal 2 Walkthrough.
You are more than halfway done for this chapter, continue to the next floor with our Portal 2 Walkthrough game guide!