Transformers: Fall Of Cybertron Walkthrough Part 29: Starscream's Betrayal Part 3

Once you have landed on the airborne platform, proceed ahead and wipe through any smaller enemies with your sword. As you move towards the shield that has been erected in the path ahead, put up your own shield to block the rockets of the enemies ahead. Kill them and pick up the exploding barrel. Toss it at the switch to the left to deactivate the shield.

As you pass through the area where the shield used to be, two Leapers will attack you. You can kill these enemies pretty easily, but killing them isn't the real objective here as they will come in infinite waves until you take down the second shield. In order to do this, you will have to wait for the two explosive barrels to spawn to the left and the right of the walkway, and then toss them in quick succession at the switches on the left and right sides of the shield. When the shield is lowered, head through the shield and down the path to find Shockwave at last. As you approach him, he will capture you in electric tethers.

As Shockwave speaks with Decepticon, hit the transform button to break free of your shackles and then hit the action button to finish off Shockwave. You will now be in your dinosaur form permanently. You will have to escae from the Space Bridge before it explodes and plummets from the sky. Sprint down the path ahead, ignoring most of the enemies or simply trampling right over them. When you reach the end of the area, you will trigger a cutscene and the Space Bridge will be destroyed as it sends its signal out into space.

The scene will transfer over to Optimus Prime's perspective. Metroplex will offer to give the last of his own Energon to power the Ark and ferry the Autobots off of the crumbling planet. With this, you will enter the final phases of the game.