Retrieve Chief Zahn's Zoni Vessel.

Kill 5 guards while under the cover of a smoke screen bomb.

Complete one Competitive Multiplayer game

Reach Central Park

Single Player: Stealth kill 25 enemies

Defend Central Station

Reach the Hargreave-Rasch building

Keep all marines alive during the rescue in Semper Fi or Die

Kill 10 enemies with grab and throw

Single Player: Kill 4 enemies in a row with headshots

Find Nathan Gould

Assimilate alien tissue at the crash site