Complete Portal Part 35 walkthrough, including strategies for Least Steps Test Chamber 17 (goal 215 steps, gold 150 steps) and Test Chamber 18 (goal 150 steps, gold 85 steps).
Walkthrough
- 1Shoot a portal above the right turret and another under a single box to knock it over. Repeat for the other turret.
- 2Shoot a portal on the ground outside your current room and another at your feet. Portal cancel.
- 3Shoot a portal above the door to the left of your entry and portal all boxes through it.
- 4Portal yourself behind the boxes, to the right of the door.
- 5Aim above the turret in the far corner of the next room, then shoot under the boxes to knock it over.
- 6Shoot a portal on the wall as far left of the door as possible, but not directly against it. Shoot another portal at your feet, then portal cancel.
- 7Shoot a portal on the floor as far left of the doorway as possible. The turret will come up the portal where you were standing.
- 8Shoot a portal to the right of the previous one, then shoot at your feet. Portal cancel.
- 9Shoot a portal to your right, near the corner of the black floor, then shoot a portal at a box from the doorway.
- 10Shoot a portal to the left of the button and another at your feet. Portal cancel.
- 11Aim at the "X" above the turret in the corner, then shoot the other below a box in the doorway.
- 12Shoot a portal near the button on the side opposite the door. Shoot the other at your feet and portal cancel.
- 13Grab the nearby box and fling it onto the button.
- 14Aim through the doorway and quickly shoot a portal below the turret.
- 15Aim through the doorway, the first grate, and the second grate and shoot a portal. Shoot the other at your feet.
- 16Quickly turn and run through the doorway and into the chamberlock.
Least Steps Test Chamber 17 (LS17)
Goal: 215 Steps
Gold: 150 Steps
Walkthrough
- 1Jump down the hallway and stand near the doorway. Wait for the cube to drop and grab it.
- 2Jump with the box into the next room and place it in the corner of the first ledge. Turn around and grab it.
- 3Place it in the corner of this ledge to hop up to the next level. Shoot a portal at the white wall after the energy ball bounces.
- 4Once it bounces, grab the box and begin jumping down the hallway. On the other end, turn and wait for the energy ball to pass overhead, then take the box and jump down the hall.
- 5At the end, crouch down where the stairs turn. Put the box down and shoot a portal through the doorway at the slanted piece of wall.
- 6Jump from your current location to the doorway, hopefully landing near the middle. Take one jump over to the corner of the ledge.
- 7Put the box down and place the portal that was on the slanted piece next to the pushed-out piece of wall, perpendicular to it so that an energy ball shot out of it will hit the side.
- 8Adjust the portal's position so that instead of bouncing directly back, it bounces off the side and into the doorway, activating the receptacle.
- 9Shoot a portal to the right of the doorway the energy ball just went through, almost on the wall of the slanted piece.
- 10Shoot the other under the box near you.
- 11Shoot a portal at the ground near the box, then another at your feet. Portal cancel.
- 12Turn around and shoot a portal to the right of the observation window and another at your feet. Aim your fall back through the portal you just came through to end up on the second piston.
- 13Jump off the corner and aim yourself around the corner to end up on a ledge.
- 14Jump down the hall and up the stairs. Shoot a portal at the ground and grab the box through it.
- 15Put it on the box. Hop into the small room and press the button there.
- 16Hop back and grab the box. Throw it into the incinerator and then hop into the chamberlock.
Least Steps Test Chamber 18 (LS18)
Goal: 150 Steps
Gold: 85 Steps
Walkthrough
- 1Jump out of the chamberlock and go to the very edge of the ledge over the water.
- 2Shoot a portal as far right of the white section as possible. Shoot the other at your feet.
- 3As you are falling, move towards the higher portion of ground.
- 4Aim for the ceiling above the next ledge and shoot. Shoot the other at your feet.
- 5While falling through the portal on the ceiling, shoot one portal at your feet, then look up. You will see a far piece of pushed-out concrete on a ledge high up. Shoot the other portal there.
- 6You will end up in a small room behind a large button. Go farther in and press the smaller button.
- 7Crouch down and quickly exit as soon as you can squeeze out from the right side. Aim for the slanted surface of the wall that just came out, then jump off the ledge to the right of the wall and shoot a portal where you would land to go flying to an area near a box.
- 8You will be shot a few times, but don't worry. If you are quick enough, you won't die.
- 9Grab the box and jump off the edge facing away from the edge. Once off, hold the analog stick backwards to end up on the ledge below the one you were just on.
- 10Drop the box and put a portal on either white wall. Press the button and shoot a portal at the wall above the door that is coming out.
- 11Grab the box and go through the portal near you. You should end up falling near the piston.
- 12Go through and place the box on the button. Shoot a portal at the far wall above the...
Tips
- For LS17, this method leaves little room for error, often resulting in 149 steps. Keep trying.
- For LS18, if you are quick enough when being shot at, you won't die.
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