Instructions
Walk to the large machine at the back of the room. Go to the left side of the machine and stand in front of the the two buckets filled with water. Move the water from the left bucket into the right bucket to lower the right bucket to the bottom of the shaft.
Run to the far-right side of the machine and stand in front of the two buckets. Move the water from the right bucket to the left bucket to lower the left bucket to the bottom of the shaft. Go to the front of the machine and press the switch in the middle to cause it to produce steam.
Run back to the platform and defeat the enemies by using heavy combos that deal damage to groups, and then proceed down the path on the right side of the screen. Jump from the platform onto the top of the large bucket attached to the crane. Ride the bucket up and jump to the platform on the left of the screen after reaching the top.
Switch to Aang and use his airbending abilities to clear the gas that prevents you from moving forward. Walk through the doorway and move behind the steam vents that block your path. Switch to Katara and use the water from the nearby faucet to freeze the steam pipes to move forward.
Walk up to the machine and move the water from the buckets in same order as you did on the level below. Switch to Aang and use his air-bang move to hit the chain attached to the large block to the right of the bucket you filled with water on the left side of the machine. When the block is lowered, hit the switch in front of the machine.
Run down the path at the far-right of the machine after the cinematics and defeat the enemies using the same techniques as before. Jump from the edge of the platform onto the large bucket attached to the crane arm. Ride the bucket and jump onto the platform on the left side of the screen once you reach the top.
Switch to Katara and draw water from the passing bucket to freeze the steam pipes blocking your path. Defeat the final wave of enemies and move to the machine at the back of the platform. Move water between the buckets just like you did on the previous two levels, and then press the level in the middle to blow open the factory and initiate the level's boss battle.