Get 506 cumulative sniper kills

Stop the execution

Snipe an enemy through his eye

Destroy a tank by sniping the fuel supply

Covertly kill 25 unaware enemies

Get 100 sniped headshots

Snipe an enemy while your rifle fire is masked by a loud sound

Stop the convoy

Use a trip mine to kill an enemy who is trying to assault your position

Clear the Finale.

Clear Part 3 of the story.

Pick up 20 pieces of trash around the city.

Clear Part 1 of the story.