Work your way through to a screen where you're told to infiltrate the base in disguise. Turn into a cyclops and walk on up. Get through the discussion and turn back into Ratchet to hop up the ladder. Then change into cyclops again before going forward to talk.

You can drop down to a titanium bolt.

Go down the elevator and start blasting again. Go to the end of the warehouse room to reach a hacking spot. There are four stages in this lock. Get through there and work your way along through the fighting that comes. Don't rush - be patient and use all of your upgraded weapons, have your armor fully upgraded and your shield on. Turn the wrench and then redirect the laser beam to the center area. Go up the magnetic wall and redirect the ending point to the side spot. Go through the doorway up there.

The next room has some nasty enemies so send in whatever remote weapons you have. continue point.

Go through the N door and see the sphere take off. "Get in!" calls the Captain and you take off in a drop ship.

You jump down through a hail of rocket sand have an enemy health bar on the right. Dr. N is annoyed with you. The health bar is for Dr. N. himself and it's time to rumble. He has a smoky red beam of death he fires at you. Dodge that and set down lots of turrets, doomies, etc. We have 100 health by this point, the shield, and the armor at 66%.

When you get him down to a third or so dead, he throws himself on your mercy. As you're gloating, he takes off. Go out into the planet area and blast at his friends.

Finally, you get him to zero. He calls for Lawrence. Lawrence is a bass player and wants to play "Bass Oddyssey" on his Dean headstock instrument. Quark shows up and you hop into your ship. You and Quark are doing ship to giant robot combat with a brand new health bar. Just stay far back, keep sliding sideways and shooting constantly. If you keep moving his bullets should miss you. Soon he self desructs.

Now the red carpet treatment awaits for you and your pals as you watch Clank on a hoverboard. He and the monkey save the day. You get a kiss from the Captain and the credits roll!

Now the two of them are stuck on an asteroid - and Lawrence wonders if he can play drums. You now have the choice of restoring to before the final battle, or going forward into challenge mode - replay the entire game starting with your full roster of weapons!

Ratchet and Clank 3 - Up Your Arsenal Walkthrough