Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Arnie	50 kills with M249.
Call of War	Finished the game on the hardest difficulty.
Cavemen	Finished the fifth level.
Customizer!	Discovered the options screen.
Da Bomb!	Finished the ninth level.
Deep Sh*t	Finished the fourth level.
Dumbass!	Died from his own grenade.
Fearless!	Watched the intro on the hardest difficulty.
Good enough	Finished the game.
Headhunter	Finished the sixth level.
Hillbilly	50 kills with M1014.
Jerry	50 kills with UMP.
Misplaced Luggage	Finished the seventh level.
Nebelwerfer	20 kills with grenades.
Out of Ammo	20 kills with melee attacks.
Out of the ice	Finished the first level.
Red Hawk Down	Finished the third level.
Rocket Jumper	20 kills with M136.
Sharpshooter	50 headshot kills.
Son of the revolution	50 kills with AK47.
Think-Tank	Finished the eighth level.
US Grunt	50 kills with M16.
Vasya	50 kills with SVD.
Yar har, fiddle di dee!	Finished the second level.