After using the gear on the right to light the gas vent in the right corner, as shown in part 1, shoot the switch again so the red side faces out, causing the gear on the right to rotate counterclockwise.

Then place a remote bomb near the switch, but don't detonate it yet. Use the grapple ring to climb onto the ledge above the gears once more.

Raise the staff to prevent the remote bomb from exploding and push it onto the pressure pad on the left. This activates the gas vent between the left and middle gears. (The one on the far left already has gas flowing out of it.)

Continue to hold the staff up as you move onto the pressure pad on the right. This activates the gas vent between the right and middle gears. The gear on the right then rotates, carrying the fire from the lit vent on the left to the vent you just activated.

Remain on the pad as you detonate the remote bomb to flip the switch, this time from red back to green, reversing the direction of the gears once more. Doing so causes the middle gear to turn counterclockwise, carrying the fire from the gas vent you just lit to the next vent on the left, which is being held open by the time bomb.

As soon as the vent to the left of the middle gear lights, jump down onto the platform...

...and quickly shoot the switch one last time. This flips the switch from green to red and reverses the rotation of the gears. Now the gear on the left turns counterclockwise, carrying the fire from the gas vent you just lit to the vent the left corner.

This completes the puzzle.

In the co-op game the puzzle is the same, but there is no remote bomb. So you'll need to light the vent in the right corner, just as in the single-player version (Part 1). Then shoot the switch so the right gear is rotating counterclockwise.

Have two players plant remote bombs near the switch and then climb onto the ledge above the gears in order to stand on the 2 pressure pads. Now all of the gas vents should be on. Wait for the wheel on the right to carry the fire to the vent between the right and middle gears.

NOTE: In these screenshots, from TheJollyMage, he and his co-op partner didn't use remote bombs and instead shot the switch from above. Do whichever works better for you.

Then detonate one of the remote bombs to flip the switch (or shoot the switch without moving off the pressure pad) to make the middle gear turn counterclockwise, carrying the fire to the next vent.

When it is lit, detonate the second remote bomb (or shoot the switch again).

This makes the left gear rotate counterclockwise, carrying the fire to the vent in the left corner. Puzzle solved.

In all versions, once the gas vent in the left corner is lit, the puzzle is solved and the water in both pools begins to boil, causing a set of columns to rise in the pool above.

If any of your characters are still on the lower level, wait for the flames on the middle gear to go out and then carefully grapple up onto the ledge, making sure not to touch the boiling water for the hot water challenge.

Then use the columns to reach the wide corridor above.

[Part 1 | Return to the Tomb of the Lamplighter Walkthrough]