Turncoat

Head to Lantuina to start this mission. You have to bring Mario a military vehicle. Fortunately, there’s one nearby. Kill the guards and take the vehicle. Pick up Mario and head to the defector’s location before the time expires. You’ll find several soldiers attacking the defector’s hideout so kill them all.

Once done, you have to escort Zeno’s helicopter. Ride along with Mario and man the mounted turret on the vehicle and use it to shoot your pursuers. Keep destroying enemy vehicles until you encounter the first SAM site. Leave the vehicle and engage the guards on foot. Clear all the nearby guards as fast as you can then hack / destroy the SAM. Once clear, Zeno and Mario will move again. Return to the vehicle and man the gun again. Repeat the process and destroy enemy vehicles pursuing you.

You’ll come across a second SAM site. Leave the vehicle once more and take out the guards so you can hack or destroy the SAM. Return to the vehicle again and use the gun to destroy more pursuers. An enemy helicopter will join the fray but don’t mind it; concentrate on the ground troops attacking your vehicle. Once you’ve reached the extraction point, defeat the remaining soldiers until the mission is complete.