Took a Russian Dog Tag in the forest ambush in Rock And A Hard Place

Defeat Putnam.

Be on the winning team at the end of a multiplayer game session.

Liberate all districts in Boston OR New York.

Kill an enemy with the last bullet in your magazine (excluding sniper rifles and Zeus x27)

Kill an enemy whom you are already dominating

Kill an enemy with the first bullet after your respawn protection ends in Arms Race mode

In Classic mode, kill five enemies in a single round

Win a round by picking up the bomb from a fallen comrade and successfully planting it

Kill an enemy while you are blinded from a flashbang

Completed a round of Gun Master

Fully distract 25 enemies with rocks (Single Player only).

Craft 25 syringes.