You will get to an helipad with two helicopters.
Immediately pull out your second weapon - the Titus - use the scope and then shoot at the helicopter.
If this does not happen, it means that you are late and Salazar destroyed the helicopter for you.
In this case, simply load the last checkpoint by exiting the mission menu and loading the mission again.
Destroy sentry turret (x2) while disabled
To pass this challenge you must have EMP grenades.
Hide behind the boxes to the left, in the gate.
Throw a grenade at the turret(picture above)and get rid of it with the Titus.
Two to three rounds should kill enough enemies to fulfill the condition of passing the challenge.
That is why, the best you might do is to find the golden mean.
Take half-second and one-second breaks and kill those enemies who are nearest to you in the first place.
Keep looking around the battlefield vigorously to locate them.
Do not waste your time on destroying the vehicles - focus on the soldiers.
In such cases, do not forget to turn it back on.
Each killed human will count in this challenge, so don’t let your team-mates kill everyone.
Destroy enemy ASDs (x2) by exploding nitrogen tanks
You have several opportunities to do it.
The first will be just after you’ve gone down the elevator in the laboratory.
Next to it, the first ASD should be passing by.
The second opportunity will be right after that.
Just opposite the elevator exit there is a corridor, which turns to the left.
At the turn, in the corner, there are some nitrogen tanks.
If they’ve been destroyed, load the last save.
If not, wait for the ASD, which will go out from the left.
You have to lure it somehow (e.g.
by shooting at it) to make it come near the tanks or just wait for the right moment.
A lot of enemies will enter the room, along with two ASDs.
Your task is to kill ten enemies with it.
To kill an enemy with it, you will need two blows.
Moreover, your allies will not be idle, “taking away” your enemies.
Collect it all to pass the challenge.
Later, most of all, watch out for the nitrogen tanks.
If they explode next to you, you’ll freeze to death.
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