Ratchet & Clank: Up Your Arsenal/Metropolis

Fly to Metropolis
On your way back to your ship, you'll be informed that the is available at the Armor Vendor. Go to your ship and travel to Metropolis for a cutscene.

Find Dr. Nefarious
Outside your ship there are some small Tyhrranoids. There is an Auto-Vendor, but no new items. There are two large Tyhrranoids guarding the entrance to the building, and a few small ones.

Once you enter the room, two very large Tyhrranoids with laser guns will fly in. Defeat them, and as you exit the room on the other side, a dropship will fly into view and begin shooting at you. From here, the next flying laser gun Tyhrranoid is visible so take him out from a distance. As you approach another one will fly out of the room and attack.

There are two large Tyhrranoids in the room and one more patrolling outside the window on the other side of the room. There is an Auto-Vendor here as well so you can restock on ammo used up taking out all the flying Tyhrranoids. Outside, there are many small and large using the environment for cover. As you exit the room a Continue Point will save your progress, and a cutscene will play.

After the cutscene, a tank which fires rockets and has a flame-thrower when you get close will come out. Take it out from a distance, using shields and long range weapons. In the alcove he emerged from, there is a Jackpot crate and two large Tyhrranoids on the platform above. As you approach a flying Tyhrranoid will also arrive. Killing the enemies and breaking all the crates (made easier with the Bolt Grabber V2) can net you over 10,000 bolts. Around the corner, dropping down a level, there are four more large enemies, and two more flying enemies will come into view.

Once they've all been defeated, proceed past them and turn right. As you move forward, two very large Tyhrranoids will drop through the roof. They will not run forward, so you can take cover behind the pillars on the side.

At the end of the hall are three more large Tyhrranoids and many small Tyhrranoids. Once they're defeated and you exit onto the grassy areas, two more Tyhrranoids will fly in along with a dropship to attack you. Once they're defeated and as you approach the platform to the left another dropship will release three large enemies before flying off.

Jump the small gap and to the left will be a Gravity Boots surface. Follow it, and as you're about to get around the corner of the building, two large Tyhrranoids will run around to greet you. As you get to the other side of the building, two flying Tyhrranoids will be there. Enemies on the platform will also shoot at you from the ground. Those enemies are difficult to hit from this angle, so continue around the second corner of the building and at the end will be two more large enemies on the Gravity Boots surface who you must defeat before getting to solid ground.

Defeat the enemies who were shooting at you while you were on the side of the building and you will see a laser and a sensor. There are also a number of exploding crates surrounding a bolt. Redirect the laser with the Refractor and rotate the bolt. At the end of the platform you're on, there is another laser sensor, so bend the laser to point at that sensor. This will extend the bridge to the last platform.

This last platform has two large Tyhrranoids guarding it. Once they're defeated a dropship will come in and drop off two more. There is an Auto-Vendor and a Continue Point on the other side of this platform, so you don't need to worry about running out of ammo. Once you cross the bridge behind the vendor, a cutscene will play.

Defeat Giant Klunk
The two of you will be on a train flying around the city. There is an ammo crate right behind you for when you need ammo. Halfway through, a second train will come up beside the first with additional ammo crates and health.

Once he's defeated, you'll receive two new missions:
 * Return to the Phoenix
 * Destroy the robotic Tyhrranoid Forces (optional)

Use the nearby hovercraft to return to your ship. The second mission involves another set of Battle Missions, accessible from the dropship near your ship, which will reward you with a new item and lots of bolts for completion, so they should be completed first.

Part 1: Countdown

 * The Tyhrranoids have occupied Metropolis and planted timed explosives throughout the city. When the clock runs out the entire area will be vaporized.  Using the Hovership, locate and neutralize all of the charges before it is too late.

The red dots on the minimap signify enemies, the green are the explosives. You will have two minutes to take out the explosives, so just target them and don't worry about the enemies.
 * Prize: 10,000 bolts

Part 2: Urban Combat

 * The bomb threat is over but the Tyhrranoids still control most of Metropolis. The Rangers are preparing to counterattack and drive the invaders out, but first, they'll need a foothold in the city.  Skydive in and make sure the operation goes as planned.

Once again, you drop out of a ship and need to dodge missiles on your way to the ground. There are a few Rangers in defensive positions who will help you defend the many waves of enemies that attack.
 * Prize: 35,000 bolts

Part 3: Tower Attack

 * After failing to destroy the Ranger assault force, the Tyhrranoids have fallen back to four towers in the city center. Use the Hovership to wipe out these last pockets of resistance.

Once again in the hovership, kill all the enemies.
 * Prize: 20,000 bolts

Part 4: Air Superiority

 * The ground war has been won, but the skies over Metropolis are still buzzing with enemy ships. Use the Hovership to wipe out the enemy air force and achieve air superiority.

There are a bunch of dropships in the area, take them all out.
 * Prize: 15,000 bolts

Part 5: Turret Command

 * The Tyhrranoids have launched a desperate last ditch offensive to retake Metropolis. Beat back the assault using a newly constructed ion-cannon turret.

Lots of saucers and dropships will attack. A lot of them will attack at some points, so use your minimap to see where they are and take them down as quickly as you can.
 * Prize: 20,000 bolts

Once the final mission has been completed, you will also receive the. With this item, you can go back to Aquatos and complete since you have a full map of the area and any remaining crystals will show up on the map when you are in the area.

Return to the Phoenix
Return to your ship and fly back to the Phoenix for a cutscene. You will receive the coordinate to the and the  to travel there.