The strategy is key in this game, make sure to not leave a trace, complete your mission without being discovered, and make it out alive.
Calculate your shots, aim right, and count the bullets, you'll need every last one of them on the field. The emblematic X-Ray kill-cam is back in all its glory, more detailed and better looking than ever before. Using your binoculars you're able to mark the enemies and points of interest in the map, as well as marking up many objectives too.
From assassinations to infiltrations, to completely wiping out waves of soldiers. There are plenty of missions in the game that will have you taking care of different objectives.