Portal: Revolution - Chapter Four - The Diversion Walkthrough (2025)

Over a decade after the release of Portal 2, fans are once again exploring the Aperture facility in the hopes of escaping the seemingly endless puzzles in Portal: Revolution. While this is an unofficial game-sized mod to the original hit title, the puzzles in this game are some of the most challenging to date.

To get through Chapter Four, you'll need quick reaction times and the ability to out-think several turrets that would otherwise turn you into Swiss cheese. In this chapter, you'll have both portals to make solving the puzzles a little bit easier. That being said, Portal: Revolution introduces new elements to keep you on your toes.

Turret Playground

Follow the path until you enter an area where Stirling starts talking and eventually opens the wall next to you. Shoot a portal on the white wall in the opening and then shoot the opposite color on the far wall behind the turret. Go through and either tip the turret over from the side or leave it alone.

In the adjacent room, shoot either color underneath both turrets to have them fall through and into a room away from you. Then, grab the cube and place it on the big red button to open the exit. In the next room, shoot one color portal on the X above the left turret and the other color underneath the right turret on the ground.

This will cause them to fall into each other until they're both knocked over. Walk to the edge of the raised platform and shoot a portal into the wall behind the last turret, then one on the ground to get behind it. Push the turret from the side to knock it over.

Jump back to the ground and shoot a portal on the red X above the raised platform where the turret was. Shoot the opposite color on the ground and go through it so you land on the raised platform. Jump over to where the cube is located and pick it up before taking it back to the first platform.

Then, shoot a portal into the high wall on the furthest part of the chamber before shooting another on the ground below you. Grab the cube and jump through, launching yourself to the red button. Drop the cube on the button, then go back to the first raised platform.

Jump across the platforms and go through the exit into the next testing area.

In the next testing area, shoot a portal of one color underneath the cube dispenser and then shoot another above one of the turrets across the room. Then, press the button to drop a cube through the portal and knock over the turret. Repeat this process until both turrets are deactivated.

Once defeated, walk through the hallway and then turn to your left to see a high wall behind the turrets. Shoot the portal color that's not under the dispenser on that wall to send cubes flying into the turrets. Repeat this process until both turrets are deactivated.

Next, shoot a portal on the ceiling above the far pathway and drop a cube through it. Ensure that it lands safely on the pathway before going through the dispenser portal yourself. Take the cube to the large button and drop it to open the exit. Go through and then get on the elevator.

Excursion Funnel Flings

When you walk into the next chamber, go over to the large red button and stand on it to activate the tractor beam. Shoot a portal underneath it, and then shoot the opposite colour on the wall next to you, opposite of the gel dispenser.

Once the tractor beam catches gel and takes it through the portal, move the portal from the wall beside you to the slanted wall. Then step off the button and allow the gel to be launched to the edge of the pathway. Next, use the tractor beam to catch the ball falling in the water and bring it back to you. Drop it on the button.

Go walk into the tractor beam and wait until you're pulled to the highest point. Then, shoot the opposite color of the portal under you across from the gel. This time, drop the gel when it goes over the ball to cause it to bounce. While falling, shoot the portal you just used on the slanted wall to launch across the room.

Press the button on the other side of the room to raise the square floor from the water under the dispenser. This will also cause the ball to disappear if it hasn't already. Place one color portal on the newly raised platform and the other on the slanted wall on the other side of the room.

Activate the button again to send a ball from the dispenser through the portal, launching it to your side of the room. Let the ball land in the input or place it there yourself to open the exit door, allowing you to get on the elevator.

Cleansing Field Loop

Go along the path until you get to a round door that won't open. Shoot a portal on the white walls next to you, and then aim one through the gap in the wall to get into the testing area. Once inside, shoot a portal on the wall with the grated area and then one on the ground or wall to get up there.

Once on the grated area, shoot one portal on the nearby slanted wall and one on the ground. Jump through the portal on the ground to launch yourself across the gap to the area with the button. Shoot one portal underneath the dispenser and the other on the slanted wall on the far right slanted wall when facing the button.

Press the button to dispense a bouncy cube before shooting the dispenser portal on the slanted wall near the button once it goes through. This will launch the cube and create a loop going through the cleansing field. Once the cube has gone through the portal near you, shoot the opposite color on the slanted wall ahead of you.

Once the cube lands next to you, place it on the button to activate the exit door. Then, go back to the starting area and use two portals to get back to the grated area. Shoot one portal on the ground below you and the other on the slanted wall on the wall opposite of you.

Make note of which portal is on the ground as you jump through it, and then shoot it at the slanted wall right before you hit it. This will create a loop that will allow you to place the portal that's behind you on the slanted wall to your left. This should launch you to the exit platform, where you can get on the elevator.

Power Switches

Walk along the path until you get to a door that opens halfway, then shoot a portal through to the white wall on the inside and the other one behind you. Use it to get into the next area and follow the path to a room with a conveyor belt. Shoot a portal on the wall above the conveyor belt and one on the ground-level wall before going through.

In the room with the broken window, shoot a portal on the far wall in the chamber and one beside you to get inside. Go through the energy field in front of you and activate the switch to turn off the power. Then, go back through the deactivated energy field and shoot a portal on the upper level on the left.

Shoot the opposite color on the same side of the energy field as the power switch. Then turn the power back on, go through, and dispense a cube before taking it with you back. Turn the power off, place the cube on the button, then turn the power back on.

When the door opens, shoot a portal through and then turn off the power. Take the cube through the portal and into the second room, where you can simply carry it above you and place it on the button. Then, go back through and turn the power on.

Shoot one portal on the ground and the other on the wall sticking out. Go through both to launch yourself across the room and to the exit door. After going through the energy field, go through the hole in the wall and use portals on the white walls next to the pipes. You'll need to jump over the gap into them.

At the end of the pipe, shoot a portal through the broken glass onto the concrete wall, then jump through the portal on the white wall behind you. Continue walking until you see an opening on the right side of the walkway and jump down before going through the energy field.

In the next room, shoot a portal of one color on the far wall ahead of you and the opposite color on the wall next to it. Step on the launcher to be thrown into one portal and out the other. Once you've landed, press the button to drop a cube and have it go through the same process.

Take the cube down a level and place it there before turning off the power. Shoot a portal on a wall near you and one on the wall near the start. Take the cube to the starting area and place it on the launcher before going back through. Shoot one color portal on the wall ahead of the launcher and one on the slanted wall in the water.

Turn on the power to launch the cube through the portals and onto the button. Next, shoot a portal on the slanted wall near you and then one at the start before going through. Take note of which portal is behind you and shoot it at the wall in front of the launcher. Step on the launcher and be flung into the exit door.

Follow the path and use portals once more to get through a broken window and into a lower area. Continue walking until you get into a chamber.

The Spire Core

When you enter a room with a door that won't open, shoot a portal on the wall near you and the other one on the ceiling behind it. Continue walking past the brief PowerPoint and then follow the path through the energy field.

The Spire Core is straightforward and mainly requires that you follow the orders of Stirling as he runs his tests using the Core. When you're asked to step inside the specimen chamber, do so.