You will now be cast a Jazz as he falls into the abyss below the Cybertronian ruins. He will come crashing down to the ground ready to blast some enemies up with his pre-equipped Scatter Blaster. The game will teach you how to grapple by requesting that you stick your grappling hook to the vines ahead. Hit RB to grapple the vines, and pull back on the left stick to rip them off the wall. Walk into the hall ahead and you will find a severed arm on the ground. The source of the arm will soon become apparent. Grab the fallen comrade's memory core from the wall and then grapple up to the upper floor.
Proceed around the corner and grapple the vines overhead, pulling them down. Head to the left and run down the hall all the way to the end. You will find a pile of ammo and health by the central pillar. As you approach, a few Insecticons will wander down from the walls on the far side of the room. These spider-like enemies will rush you and attack at close range, making - surprise - the Scatter Blaster the best weapon for the job. Let them rush in close to you and blast them with the Scatter Blaster. Hit them with melee attacks to flip them onto their backs, making them defenseless for a while. This also makes them succeptable to another quick melee =strike or a Scatter Blaster shot, both of which will kill them instantly.
When all of the waves of enemies are gone, pull down the vine wall with your grappling hook and run into the hall. The area will be overloading with toxins, and you will have to escape immediately. Rush down the hall with your LB sprint, using the grapple points to rush quickly ahead and up. You will come across more enemies, but just ignore them when you can. They will only serve to hold you up. Simply keep running ahead and grappling. When you reach the point with the acid pits underneath the catwalks, be very careful not to grapple to the wrong place or undo your grappple prematurely. You will die instantly in the acid. At the next point, you will find your path ahead blocked by three tankers. Blast the tanks with your Scatter Blaster to blow them, and then grapple ahead.
The path out of the caverns will be just ahead. Run outside and look up to the right to find Cliffjumper in danger. Grapple the large column and pull it back to free Cliffjumper, and then transofrm into vehicle form and chase after him, grabbing up the crates and money along the way. Cliffjumper will lead you to a thick door that will scan you, deeming you unacceptable for entry. Grapple the door to blow it and open it, and then head through to the other side, which will be awash in blue acid. Grapple up to the right and then help Cliffjumper up with a quick handhold. When you reach the top, the tower in the distance will unleash a beam of energy into the sky, shaking the area to its core. Head through the door behind you and transform into vehicle form, being sure to grab the currency from the crates along the way. Enter the next area and grapple up to the above platform, where you will find a sniper rifle. Pick the rifle up and zoom in to the ahead wall, where you will find an enemy sniper.
Pick off the first sniper and then grapple up to where he was. Use this elevated position to pick off the enemies below you using the sniper rifle. Use your grappling hook to score better vantage points on the battlefield below you. If you can't get a bead on an enemy, you can always rearrange your perspective to get a better shot. Whev everyone is gone, head into the central control room below and pull the switch to grind the gears ahead A piece of debris will fall into the gears and clog them, paving the way for more sniper enemies to fly in and assault you. Stay in the room for now to avoid the brunt of the enemy's shots. The snipers will try to take up positions high up on the side most walls. Note that in this battle, if you shoot an enemy out of the sky with you r sniper rifle, you will get a special Achievement or Trophy.
When most of the enemies are gone, feel free to head out and grapple up to a higher position to pick off the rest. When all of the enemies are gone, grapple up next to the gears and grapple the clog in the gears, using your rope to pull it out. This will trigger more enemies to fly into the area to your far right. They will try to snipe you, but now that you have your sniper rifle too, you can deal with them easily. Use the catwalks below to refill your ammo and health. Now you will have to shoot the chains holding up the gears. Use your rifle to shoot the chains, which are marked by red indicators. A few more enemies will land on the door that opens up as a result. Shoot them down and grapple to the rock in front of the door. Hit the grapple button to grapple the door, and pull back on the control stick to rip the door down and open up the path to the next area.
