Complete the indicated task to unlock the achievement.

Achievement	How to unlock
3 for 1	Kill 3 enemies with 1 grenade.
360 No-Scope	Kill all enemies without using the sniper rifle.
Almost started	Die without any shots fired.
Baba Yaga	Kill 500 enemies.
Chain Reaction	20 Head or Heart-shots in a row.
Cougar 9000	Destroy an enemy vehicle.
Eagle eyes	Kill all enemies using the assault rifle.
Enjoy the Fall	Shoot and kill all enemies fast roping from all the helicopters.
Firepower	Fire 4 000 bullets in a level.
Fly Swatter	Take out the helicopter rappellers.
Free Haircuts	10 Headshots in a row.
Free your mind	Complete Simulation Mode.
Frugal	Get 4 kills without missing a shot.
Grenadier	50 kills from grenade.
Gun Kata	Juggle the gun from one hand to the other.
He'll Live	25 Leg-Shots.
Head Banger	Kill 5 enemies with headshots.
Hiya, fellas	Kill all enemies with Semi-Auto weapon only.
Hot Potato	Throw back a grenade and kill an enemy.
I'd like to make a dinner reservation	Kill 200 enemies.
In For Some Chop	Shoot and kill the boss helicopter.
Jon Bovi	10 Heart-shots in a row.
Juggernaut	Take 50 damages before dying.
Lost my glasses	Fire 20 bullets before hitting a grunt.
Master Hitman	200 headshots.
Mr. Wick	All kills are either Head or Heart Shots.
Nimble hands	Drop your weapon 20 times.
Party on dudes!	Complete Arcade Mode.
Perfect Game	Kill all Targets with Grenades.
Point Break	50 Crotch-Shots.
Popcorn	10 head shots.
Reserved Parking Only	Kill 5 enemies without missing.
Return to Sender	Throw back grenade and kill an enemy.
Suppressing Fire	Fire 50 000 bullets.
Touch the sky	Die during the rooftop boss.
Usurper	Die 5 times in a row without hitting a grunt.
Vaya con Dios	Kill the Boss, while taking no damage from his Minigun.
Vehicule not ready yet	Die during the garage boss.
Walk in the Clouds	Complete Training Sim in under 3 minutes.
What did you expect?	Hit a grunt with a magazine.
Woops	Dying by your own grenade.
Wrong place, wrong time	Kill all civilians in the training room.
Yeah, I'm thinking I'm Back	100 headshots.