Eliminate Agorian Air Support is a mission in A Crack in Time, taking place in Krell Canyon on planet Lumos. Ratchet and Alister Azimuth had to repel an invasion by the agorians on a vullard settlement to get one of the vullards to tell them the location of the temple containing the Obsidian Eye. They first defeated the agorian riders and Hydra tanks, and only had to defeat the agorians' fleet of Talons using a turret offered by the vullards.
Walkthrough[]
Take control of the Fusion Turret in front of you. Its default fire function has unlimited ammo, but firing too much will generate too much heat, forcing you to wait for it to cool down again.
It is also equipped with homing missiles, but only has enough to fire sixteen barrages. Hold 
to lock onto the Talons flying around, and let go after locking onto three or four ships. It is recommended to try and target those flying in formation and not any flying too far away, lest you waste your missiles.
You need to destroy forty of the ships flying around, with most flying solo, some in formation, and a few of them coming towards you in strafing runs. The latter are the only threat, other than the homing bombs that are periodically launched towards you. After destroying all ships you will finally be able to leave Krell Canyon behind and continue with "Explore Vogal Caves".
However, before you do, it is recommended to explore Krell Canyon first without the presence of the agorians. You will be able to find a large amount of crates, including camo crates, and a number of Zoni and gold bolts.