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Was it worth it? Complete the game on Realism Difficulty.

Can't touch this Defeat Makarov on Veteran difficulty or higher without getting hit in the alley.

Incoming! Destroy every vehicle reinforcement at the SAM Site before they unload in 'Stranded'.

Long Shot Snipe all 4 enemies firing the mortars in 'Counter Attack'.

Pacifist Complete 'Assassins' by only killing one enemy.

Revenge Kill everyone after Shin dies in 'Assassins' on Hardened or harder difficulty.

Raining Thunder Kill 15 enemies with 3 mortar rounds in a row in 'Losing Ground'.

Bullet Train Kill 50 enemies while standing on train cars in 'Hired Gun'.

No Stone Unturned Confiscate all of the contraband and read all of the notes in 'Following Orders'.

No Harm Done Obtain the defector's location in 'Following Orders' without hurting any civilians.

Safety's On Defeat all enemies in the kitchen of 'Out in the Cold' without firing your gun on Hardened or harder

Skeet Shooting Kill 10 paratroopers in 'Mayhem' before they hit the ground.

Hold the Line Complete the game on any Difficulty.

Trench Broom In 'Entrenched', kill 15 enemies with a shotgun before securing the Target Building.

Never Forgotten Recover the Dog Tags in 'Escape'.

Time to Crate Open every Yellow Supply Crate in 'Stranded'.

Scavenger Repair everything in Base Camp.

Noteworthy Read 50 different Notes.

One Giant Leap In Moon, become trapped in the Receiving Area and free yourself through resurrection in co-op.

Big Bang Theory In Moon, gain sweet, sweet, revenge.

Cryogenic Slumber Party In Moon, complete Richtofen's grand scheme.

Easy Rhino In Dead Ops Arcade, use a Speed Boost to blast through 20 or more enemies at one time.

Insert Coin Access the terminal and battle the forces of the Cosmic Silverback in Dead Ops Arcade.

Time Travel Will Tell In Shangri-La, acquire the focusing stone.

Eaten by a Grue Play Zork on the terminal.

Just ask me nicely Break free from the torture chair.

The Collector Buy every weapon off the walls in a single Zombies game.

Ground Control In Moon, prevent each excavator from breaching the base in one game.

Fully Armed and Operational In Moon, acquire 3 pack-a-punched weapons at the same time.

Perks in Spaaaaace! In Moon, purchase every perk in one game.

One Small Hack for a Man... In Moon, hack something.

Zomb Disposal In Shangri-La, dispose of a Napalm zombie without it harming any players.

Small Consolation In Shangri-La, use the 31-79 JGb215 on each type of zombie.

Blinded By the Fright In Shangri-La, kill a Shrieker zombie while blinded by it.

Monkey See, Monkey Don't In Shangri-La, get something from the monkeys.

They are going THROUGH! In Ascension, kill at least 5 zombies with 1 Gersh Device.

Chimp on the barbie In Ascension, kill a space monkey with a fire trap.

Space Race In Ascension, Pack-a-Punch a weapon before round 8.

The eagle has landers In Ascension, escape on all 3 lunar landers.

Stuntman In Call of the Dead, make a zombie explode using the V-R11.

Sacrificial Lamb Shoot at or be shot by an ally with a Pack-a-Punch crossbow and kill six zombies with the explosion.

Shooting on Location In Call of the Dead, kill 10 zombies with one Scavenger shot from over 100 feet away.

Quiet on the Set In Call of the Dead, cut the lights on the Director.

See Me, Stab Me, Heal Me Fire a Pack-a-Punched Ballistic Knife at a downed ally to revive them from a distance.

Stand-in In Call of the Dead, send the crew to Paradise in solo or co-op.

Ensemble Cast In Call of the Dead, send the crew to Paradise in co-op.

Sally Likes Blood Demonstrate killer economic sensibilities by taking down 3 enemies with a single bullet.

You Gotta Know When To Hold 'Em Complete Survival+ mode in 21.

On the Grid Mark 30 enemies

Just the Wind Stealth take-down 15 enemies in a row