Here is the full list of all 11 Sniper Tactical achievements.
Kill 100 enemies
Kill 1000 enemies
Kill 9999 enemies
Kill 1000 enemies with headshots
Kill 9999 enemies with headshots
Art of sniping mastered!
Roofs are now a safer place to hang out!
Heavy sandstorms are the nice variant for bad guys.
You are always covered.
If you see the flash....
Not only leaves are gonna fall in this forest.