Once you're through, you must perform some tricks and score 15 points. The easiest way to do this is to perform barrel rolls. The first roll gives 3 points, and the following rolls give 1 point each.
After acquiring 15 points, the first part is done. In the second part, AR training will begin, where you need to shoot targets for three minutes. As soon as you hit your first target, the timer will begin.
There is no required score limit here. You just need to kill time. If you want, you can just score 1 point, land the plane somewhere, and wait out the three-minute timer.
Each target is colored differently and gives points based on the color. Gold gives 10, Red gives 5, Blue gives 3, and White gives 1 point.
Once the timer ends, you will be asked to return to the Fort Zancudo Hangar. However, you will be met with enemy choppers, jets, and Avengers.
The best way to take on choppers is by going slightly behind them and using homing missiles to lock on. Do not shoot when facing head-on, as the missiles mostly miss the mark. The missiles are much more precise when shot from behind the target.
Some choppers won't move until you get close to them. You can use this to your advantage so you can hit them accurately. You can use your hover mode and keep your distance to target them. This way, the choppers won't move, and the missiles will hit them, guaranteed.
It is okay if you are left with one or two choppers. If the jets spawn in, start focusing on the jets primarily and take them all out before the enemy Avengers show up.
Use the same strategy of shooting the jets from behind. But, whenever you shoot at the jets, double shoot at these jets as two missile shots can generally take them out easily.
You might not even notice, but some jets may gradually crash due to the damage your first shot might have caused them.
Once the Avenger spawns, do not focus on that. Continue to clear the sky of any choppers and jets. We will shift our focus on the Avenger at the end as it is very easy to take care of it.
After taking care of the last jet or chopper, go into Stealth mode and lure the Avenger through the canyon. If you were on Hard mode, you will have two enemy Avengers following you, but you will still use the same strategy. Just ensure that both closely follow you as you enter the canyon.
As you go through the canyon in Stealth mode, you will notice that the enemy Avenger(s) will crash on their own. They will either hit a mountain, a tree, or a bridge, and will explode on impact. Yup, it is that easy.
Now, fly back to Fort Zancudo Hangar to complete the mission.
After surviving the aerial onslaught, your next mission in Project Overthrow is Breaking Ranks.