Complete 'Blackout' on Veteran difficulty.

Ring the red bell in both rooms and survive the attack.

Knife an enemy without him ever knowing you were there.

Kill 5 enemies in a row using 5 different weapons or attachments.

Plant the C4 in 'Cliffhanger' without alerting or injuring anyone in the blizzard.

Collect 45 enemy intel items.

Assault Makarov's safehouse.

Execute the plan to help the Americans.

Storm the gulag.

Kill 4 enemies with 4 shots during a slow-mo breach.

Kill at least 10 enemies with one Predator Missile.

Kill 2 enemies with a single bullet.