Defeat 30 enemies with the Wes - 44

Completed "Operation: Anchorage!"

Completed "Trouble on the Homefront"

Defeat 20 enemies with a single punch, after softening them up with gunfire

Complete all levels in The Canyons

Complete a level with more than one player

Defeat three enemies with one explosion

Escape Vorkuta.

Collect 75% of the prize bubbles on the story levels

Build and save a level with the thermometer more than 30% full

Defeat 30 enemies with Mk-NDI grenades

Complete all story levels without dying, with the exception of those levels that only end when you die