Complete the indicated task to unlock the achievement.

Achievement	How to unlock
All Out Of Bubblegum	Defeat the Guardians of Devastation on Hard.
Chain Reaction	Kill enemy soldier with a random rocket.
Final Countdown: Activate All Terminals	Activate all Terminals in order to escape the Nuclear Explosion.
Final Countdown: Escape without activating any Terminals	Escape the nuclear blast without activating any Terminals.
Get to the Chopper!	Bring a red shirt to the Chopper Pad.
I'm No Dummy	Destroy all Practice Dummies.
Mass Extinction	Kill 10 Enemy Soldiers with a single grenade.
Need Some Backup	Defeat the Guardians of Devastation on Co-Op.
Ricochet	Kill Enemy Soldier with a fuel barrel.
Road Kill	Run over 25 Enemies with a Tank.
That's my Ride	Steal a Tank.
Training Complete	Completed Seal Team Training.
Who needs Tanks?	Complete Armor of GOD level without using any Tanks.
You Can't Touch This	Complete Crossing Over with No Damage.