If you’ve played HITMAN 2016, you know that there are the same missions which can be done in different ways; different challenges and ways to do a missions is essentially what Sniper Ghost Warrior 3 is going to have.
CI Games have made it so that missions designed to be challenging to the player, and getting through it, while completing it is a reward on its own.
Challenges may include enemies having heavier armor, or not one-shot killed, head shots only and some in which you are limited to a certain set of tools and weapons, basically handicapping you while you try to complete it.
Sniper Ghost Warrior 3 is an upcoming game in which you play through the eyes of an elite marksman, taking you through treacherous terrain and locations to complete your missions.