Chapter 7: Taming Gollum

Go to the left area, hit the blocks, build the stairs using Gandalf's staff, then climb up the stairs. Continue along the path until you will trigger a scene below the tower. Build the stairs at the bottom of the tower. Climb up. Break the chain then climb up again.

To avoid the Balrog's attack, stay at the foreground ledge of the tower, then jump up as he does his swipe and shockwave. Wait for the lightning bolts to crash down, stand at the area hit by lightning, then hold Circle to gather up and point the crosshair on one of his wings, you'll know if you hit the right spot if his body turns red. Do this two more times, hitting his other wing, then his chest.

Highlander

You have to find six fishes and put them in the basket. First is in front of you. Second is below the ledge where the basket is. Next switch to Sam, go to the right area then climb up the rocks using Sam's elven rope by pressing Circle then holding left on the left stick to gain momentum, once you're high enough, press X upwards to jump up. Hit the plants then build a ladder, then climb up and get the fish. Now go to the right and use Frodo to enter the dark cave, then once inside use Sam to dig up the fish. Next go to the rightmost area with the colored tile floor, push the pillar to the right then up, use Sam to dig up the plant then grow the vines. Climb up the vines, jump across the pillar. Hit the brown objects below the vines with Sam to reveal a fireplace, you need 3 firewood to light it up, the first two are in the brown areas that you can see in the current screen, the last one is on the rocks on the left. Put the firewood in the fireplace, light it up using Sam, then climb up and pick up the fish. Keep going right, smash some brown plants, use Sam to build the object and climb up using the Elven Rope. Press up on the rope to climb up, then jump up the ledge. Build the flower, climb up the flower using Frodo, enter the small hatch, shimmy to the right, then pick up the fish on the dark cave. Drop down and walk to the right, push the boulder on the right, throw the fishes into the basket by tapping Circle in front of the basket. Enter Gollum's lair.

Pick up the fish in the middleground, then throw it at Gollum. Once he drops down, press Circle in the glowing area using Sam to pull him up, then mash the button prompt to struggle and hit him. Switch to Frodo, enter the dark cavern on the background, smash the objects and pick up the fishing line. Use Sam to dig up the dirtpile using Sam to grab a golden hook. Throw the rope at the wall on the left, then pull down the large rocks to get a fishing hook. Combine these items by bringing up your inventory, make sure the items are equipped in one character only. Go to the left area, climb up using Sam's rope, hit the item to get a pole. Combine this with the first 2 item to create the fishing pole. Fish at the dock on the left, follow the button prompts, get the fish. Throw the fish at Gollum, then repeat the same process to damage him. Keep doing this until his hearts are gone.

Follow the trails to trigger the next cutscene.