Complete Act 1

Complete the game on Casual

Complete the game on Expert

Collect all secrets in Act 2

Kill three or more enemies by shooting a grenade

Achieve 100% accuracy in any single player mission

Kill 30 enemies using your sidearm

Kill 50 enemies while holding your breath

Kill 25 enemies using thermal or night vision goggles

Kill Maddox once and for all ("No Loose Ends")

Kill all enemy snipers in Sniper Alley without being hit ("Ghosts of Sarajevo")

Retrieve your weapon without being detected ("Burning Bridges")

Kill all enemies in the beach houses without causing an alarm ("Leave No Man Behind")

Complete the Campaign using max one medkit per mission

Kill 50 opponents in multiplayer

Take 25 headshots in multiplayer

Kill 10 opponents in multiplayer using your sidearm

Win 10 Team Deathmatch rounds

In one multiplayer round kill an opponent with a sniper rifle, sidearm and melee attack

Complete "Operation Siberian Strike"

Complete "Last Rites"

Complete the first interrogation

Complete the third interrogation

Collect all secrets in Siberian Strike campaign