Part 37

Complete walkthrough for Portal Part 37, covering Least Portals Test Chambers 16, 17, and 18.

Least Portals Test Chamber 16 (LP16)

Goal: 9 Portals

Gold: 2 Portals

1. Run out of the chamberlock and enter the door at the end of the hall (after the voice).
2. Pick up the turret and keep hold of it.
3. Run with it through the next room and into the hall that has the other turret at the end.
4. Stand in the small area to the right of the hall until the turret at the end resets.
5. Use the turret you are holding to rush the other one and knock it down.
6. When the turret is done shooting, grab either one and stand to the side of the stairs (but don't stand on them yet).
7. When ready, rush up the stairs and knock over the turret at the top with the one you are holding.
8. Drop both of them here.
9. Follow the hallway down to the end.
10. Take both boxes out of between the piston and the wall.
11. Place the first box in the middle of the hallway with the two turrets, so that it is directly in the way of both lasers.
12. Take the second one and hold it in front of you.
13. When you are ready, run with the box in front of you and knock over the closest turret.
14. When it's knocked over, drop the box and crouch behind the second box.
15. Wait for it to return to its original position.
16. When it does, grab the box in front of you and run down the hall, keeping crouched.
17. When the wall to your left ends, get up and run the final portion to knock over the other turret.
18. Stand in the corner behind and to the left of the turret if you need to replenish your health.
19. Take the box and rush the other two turrets, knocking them over.
20. Enter the left door and quickly knock over the closest turret.
21. Once it's knocked over, crouch down and hide behind your box.
22. When the turrets reset, grab your box.
23. Rush over to the turret in the small inlet to your right first, then run to knock over the other one without stopping.
24. Stand to the left of the door, hugging the wall and place your box on the button.
25. Look through the door way.
26. Aim your portal through the doorway, the close grate, and the far grate and shoot.
27. Shoot the other at a wall close to you and go through.
28. Quickly get out of the way of the turret by entering the chamberlock.

Least Portals Test Chamber 17 (LP17)

Goal: 4 Portals

Gold: 2 Portals

1. Run out of the chamberlock and wait for the cube to drop.
2. Bring it into the next room and place it next to the ledge.
3. Jump onto it to get onto the next ledge.
4. Turn around and pick up the cube.
5. Use it the same way to get onto the next ledge.
6. Hold the box in front of you as you run down the hallway to make sure that the energy ball (which if you timed it right should be returning as you run down the hall) doesn't hit you.
7. Once you make it to the end, descend the stairs.
8. If you are making the right time, run up the next set of stairs and turn around.
9. The ball should be just now shooting and should bounce off of your box.
10. Continue backwards down the hall.
11. At the end, descend the stairs.
12. Enter into the big room, and throw the box over the edge near where the pistons would come up.
13. Look over the left-most door here to find a camera.
14. Shoot a portal there and turn around and aim for the camera near the stairs you just came down.
15. Shoot the other there.
16. Grab that camera and jump down with it.
17. Carry it to the right, where the three pistons are in the ground, and place it in the indentation with the ledge above it.
18. Go grab the other and place it on top.
19. Finally, place the box on top of both of these.
20. Jump up your makeshift ladder to reach the ledge.
21. On top, turn around and crouch down to grab onto the box.
22. Bring it into the next room up the stairs.
23. Place the box on the button and run into the small room it opens.
24. Press the small button here, then run out and grab the box.
25. Drop it into the incinerator.
26. Run into the chamberlock.

Least Portals Test Chamber 18 (LP18)

Goal: 30 Portals

Gold: 16 Portals

1. Run out of the chamberlock and go to the very edge of the ledge over the water.
2. Shoot a portal as far to the right of the white section as you can.
3. Shoot the other at your feet.
4. As you are falling, move towards the higher portion of ground.
5. Turn and face the next pistons.
6. Shoot a portal above them, then shoot the other at your feet.
7. Look to the right of the dividing wall and up to see a pushed out concrete portion.
8. Shoot a portal there.
9. Then jump off of your current platform to the right, where you will see a small checkered platform right on the water.
10. Shoot the other portal as close to the center of this as you can.
11. Go through.
12. On top, jump off of the ledge and fall through the portal again to end up on a platform with a button.
13. Go through the doorway and press the button.
14. Squeeze out of the piston as quickly as you can, then shoot a portal (the one on the concrete slab, not the one on the ground above the water) when the slab forms a 45 degree angle.
15. Quickly crouch back down and run back to the ledge with the button.
16. Jump off and into the portal to be sent flying to a far ledge with...