As a well trained sniper, save the civilians from a hostage situation by shooting the terrorists who are shooting at you while avoiding shooting the hostages. Use your scope for a closer view, look at the thermal indicator to spot the enemy and choose from 4 different sniper riffles. Are you the king of snipers?
Use the mouse to aim and shoot. Press Spacebar to zoom in/out. Press R to reload. Press 1-4 to switch weapons.