ArmA 2: Operation Arrowhead [cheats]
Successfully complete the indicated task to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", "My profile", "View all my games", then the game and view stats.
Hunter: Shoot down 100 seagulls.
Marksman: Complete the Firing Range with 100% accuracy and at least 20 shots fired.
Quartermaster: Unlock all Armory items.
Sky High: Get to 2000 meters altitude.
Speedfreak: Complete the Mobility Range in under 1:00.