Battlefield: Bad Company
50 Achievements
1,000
150-200h
One In a Million
Hit hostile helicopter with laser designator
20
How to unlock the One In a Million achievement in Battlefield: Bad Company - Definitive Guide
The Laser Designator is located near a dam on your way to the monastery. It's to explain where it is but there are a couple of boats and a hanger nearby.
Once you've got that carry on with the mission until after you've rescued your team. On the way down to the next checkpoint a chopper will start to attack you. It can be very hard to hit and you won't have much space for cover while you're aiming. So the easiest way to do this would be to work your way back up to the monastery and climb to the top. From there you have plenty of cover and the chopper won't move around much.
The best chapter to attempt this trophy is the final chapter 'Ghost Town'. The best strategy for getting this trophy is to find some cover, take out the Laser Designator and lock on to the helicopter. To lock on to a target with the Laser Designator, hold and hold to begin the lock. Once you have a full lock you will hear a voice confirming it, and after a few seconds you will take control of the missile. To control the missile, move the Right Analog Stick. It may take a few attempts, so don't give up. This trophy can be quite frustrating to try and get on 'Hard' so I would recommend doing it on 'Normal' or 'Easy'.
Note: For practice, you can lock on to empty enemy vehicles with the Laser Designator and practice controlling the missile.
By far the simplest level to get this in (if not the only one) is the final mission “Ghost Town” against the final boss.
You’ll receive a laser designator about 2/3rds of the way through the level during the mini-mission “REACH THE GOLD.” A laser designator will be dropped for you to pick up and use to destroy a silo. After you’ve destroyed the silo hold onto the laser designator until the end of the level when you get the objective “Take down the legionnaire.”
The legionnaire will be in a black helicopter and will fly around, stop, and then resume flying. You can take him down without too much trouble by zooming in with the laser designator and targeting him while he is moving. Hopefully he’ll stop moving as the missile starts coming into orbit and you’ll be able to get to him before he has too much of a chance to move.
Also, it doesn’t matter if it kills him, it just has to connect with the helicopter and the achievement will unlock.
Be sure to clear the surrounding area of enemies before you try to hit the helicopter.
The laser designator is the gadget that looks similar to a high-tech pair of binoculars. You use the laser designator by “locking onto the enemy vehicle” by holding the crosshair over the enemy and holding until your buddy gets the enemy’s coordinates. After a couple of seconds you’ll be controlling the missile, use the RS to lean it in the direction you want and steer it at the enemy which now has a yellow aimer on it.
“Legionnaire” is a black helicopter that flies in circles and periodically stops, start aiming at it while it is flying and if you are lucky, when the missile starts flying it will stop, then you will be able to hit it without any problems.
It doesn't matter whether you kill him with a rocket or not, the main thing is to hit him.