1. 100% impact ratio with SAM engagement on highway
When you reach the SAM turret on the highway at the start of the mission, you need to use it to shoot down drones. The catch for this challenge is that you need to have a 100% accuracy rating. To do this, make sure that the turret locks on six drones completely before letting go, any less and the non-locked missiles will miss.
2. Perform headshot (x10) sniper kills from the upper freeway
When you are given the option to rapel down the broken highway or stay up top and snipe, take the latter option. Get 10 headshots on the advancing enemy ground forces to complete the challenge.
3. Direct quad drones to eliminate enemy personnel (x8)
When you reach the area with the CLAWs, before advancing, check in the back of the truck nearby for an access point containing the hover drones. Use these to target and kill eight enemies and you will finish off this challenge.
4. Rescue trapped SSA in damage vehicle
After killing both claws, you will find yourself at a shopping centre. before entering the building go and interact with the hatch of the rolled armored vehicle nearby. Some marines will emerge to help you out and will consequently cause you to complete the challenge.
5. Destroy enemy drone (x30) using SAM on roof
Inside the shopping centre at the top of the escalator, you will find a door that you can access to the left. Enter the door and climb up to the roof. Interact with the SAM turret here and use it to shoot down 30 enemy drones.
6. Protect G20 cougar at intersection
After moving through the shopping centre area, you'll get an objective to protect the G20 leader. Nearby ahead you will see an armored truck, this is what we need to protect. To do this, pick the RPG gunners off the nearby rooftop to complete the challenge.
7. Destroy drones (x3) with one shot
During the sequence in the jet, you will enter a chase mode where you need to boost after and shoot down enemy drones. At this point lock on to one of these and fire off a missile in an attempt to knock down three at once. It is not easy and there is no real trick to doing it, just keep at it and eventually you'll unlock it.
8. Protect all G20 vehicles
Whilst flying the jet at the end of the mission, you will need to escort vehicles along a set path through the city streets. To complete this challenge, you need to ensure that all of the vehicles remain intact. To do this, stick close to the convoy and lock on and shoot all the tanks, helicopters and enemy vehicles as soon as you see them. Once you enter the next phase of the mission, if the vehicles are all still in one piece, you will complete the challenge.
9. Collect intel (x3)
After dropping down from the broken overpass onto the highway, look over on the far left of the area to find this collectible tucked away behind some cars.
On a counter in the building on the left side of the street at the point where you need to destroy the two enemy CLAW units.
After killing the second CLAW, walk into the Downtown Plaza building, climb the escalator and look on the shelf below the shirts on the right for enemy intelligence number 3. 10. 100% survivability rating
Complete the mission without dying