As you come back through the BLUE place a new ORANGE on the top right corner so that it flings you into the Cube.

So leave the BLUE and again place the ORANGE over the Faith Plate. Now line up the Cube with the next relay which is located in the starting area.ĭrop down again and we are going to do another double move fling to get the final Cube which is high to the right of the starting area from our current point of view. Repeat the process to get yourself over there also. Drop the Cube into the BLUE and then look hard right and place a ORANGE so that the Cube will fling over to the first relay area. Leave the BLUE on the ground and place the ORANGE in the far straight middle above a Faith Plate. Now we have to fling the next Cube, which is located right on the ground floor, over to this first relay area. Now line up the beam to the first relay across the way.

So place a ORANGE up there and drop through the BLUE with the Cube. Now we need to take the the Cube to the back right from the perspective of starting the level. Throw an ORANGE up there and the drop down and put a BLUE on the floor and drop through getting the Cube.

Start by looking to the high right and you'll see a Cube up on a single platform with a portalable ceiling. So we have a LOT of relays to light up in this puzzle. Finally put a ORANGE on the top of the bridge and a BLUE to get you over to the Exit. Now go grab the other Cube and place it at the far end to redirect the beam one last time into the last relay. First use the Cube to redirect the beam into the turret and destroy it and then redirect the beam through the two right relays. Again, use portals to move if you have to stay away from the turret. With the cube in hand go to the far back side near the entrance. If its traveled too far to get safely simply put a portal underneath it and one near you to bring it you you. Watch out for the turret and grab one of the cubes. Place a ORANGE on the far wall by the cubes and a BLUE near you and travel back to the starting side. Now hit the button and if you placed the portals right the Cube will hit the wall and land into the main area somewhere. This is to create a wall for when the Cube falls. Now we need to place a ORANGE on the top of the Light Bridge and a BLUE on the top of the far left ceiling. Put a ORANGE portal on the far back right and a BLUE underneath yourself so that you can jump over there. When you come out into the puzzle chamber you'll be looking at a light bridge pointing to the ceiling.

Portal 2 chapter 4 walkthrough