Reach Sergeant (Level 10) in multiplayer Public Match.

Defeat three enemies with one explosion

Defeat 50 enemies with the 92FS - 9mm

Defeat ten enemies in a row with hand-to-hand combat

Defeat 20 enemies with hand-to-hand combat

Melee 5 enemies in a row.

Kill 50 enemies in a row without dying

Find 15 treasures

Find 10 treasures

Kill 50 enemies with the AK-47

Find five treasures

Kill 30 enemies with headshots