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Reach Precursor Core
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Another driving mission. Jump remember to stay alert and shoot the red balls 
that appear before you. Patience is the key here. Just keeping shooting and
look for cracks in the floor. Not really that hard.

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Destroy Dark Ship
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As the mission begins, shoot a quick gyro burst to eliminate the metal heads
before you, once they are gone the door will open. Next you will see rotating
platforms, jump across them when they appear (don't bother double jumping as
it will take more time) using the needle gun to destroy the flying metal heads
without aiming.

Jump up the ledge and down the ice tunnel, taking extra care to jump to the 
side when you reach the bottom. Next, take a left and jump across the beams 
(or fly). Keep following the path and defeat all the metal heads to open the
next door. You will now be in front of a light eco fountain, charge up and fly
across the platforms to the other side. You will now be in front of another 
light eco fountain. Defeat the flying metal heads before you fly over yourself.
Defeat the metal heads here to open the next door. If you somehow manage to run
out of time, use the flash freeze to stop the clock. 

This part of the mission isn't too hard. Just avoid the pieces of the bridge as
they come your way. If you get hit then you might walk to roll jump (L1 + X)
to catch up. Also, the flash freeze might help you out. I didn't have enough
light eco so feel free to try. 

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Destroy Final Boss
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The mission begins with Jak inside one of the crappier cars in the game. 
Anyway, follow the red dots, taking a left at the first turn to find Errol in a
huge spider like machine. 

Your job here is to shoot the purple gems on Errol’s feet. Some of them will be 
on the back of his heel, meaning they are easy to shoot if your are driving 
behind him. While others will be on the front of his foot. This can be 
difficult. You have two option here, either slid around his foot and shoot 
(Circle + Directional button) and shoot. Or veer ahead in front of him and blow
them up that way. Errol will also make thins a little bit more difficult by 
shooting various dark balls at you. If you shoot these you will get a boost. 
When you see a green dot on the screen, that means a dark buzz saw is coming, 
stay away from it as much as you can. Try not to throw you controller through 
the TV screen here.

As the final phase of the mission begins, defeat the little metal heads to 
activate a lift at the end of the ledge. Do this a few times to reach Errol.

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Boss: Dragon Errol|
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Note: This battle was fought in Hero Mode

The battle will begin with Errol shooting metal heads at you. Defeat them with
excessive use of your Needle Laser, Gyro Burster and Wave Concussor. As soon as
the battle starts, shoot a peacemaker bullet at the tentacle in front of Errol,
that one shot will take out all of the tentacles on the screen. Once you have 
fought off the waves of metal heads, Errol will begin to shoot tracker beams at
you (after the first phase), these are easily dodged, just run. After that 
Errol will swipe his laser beam across the screen from side to side, jump to
dodge. When he turns his head to begin another swipe, shoot the red light on 
the back of his head. For a guaranteed hit, use you needle laser. 

All of the remaining stages are pretty much the same. The only two differences
lie in the third phase when Errol begins shooting buzz saws at you. Simply 
shoot these to destroy them. And in the last phase (when Errol has little 
health left) he will ram his head into the ground. This can be dodged by simply
running all over the screen. 

My advice for this battle would be to stay in the center (after destroying the
tentacles) and shoot multiple wave concussor shockwaves. If you don't want to 
do that then you can shoot multiple needle laser bullets to clear the 
battlefield. Also, take advantage of the light eco fountains that appear when 
Errol swipes his laser beam across the screen. If you need to heal make sure 
you do it whilst on top of the fountain as to not lose any light eco. That’s 
pretty much it.