Shooting people in the head is the big one
Being a sniper isn't easy work. The bad ones aren't long for this world. That's why you'll want to know everything you possibly can before trying your hand at this dangerous profession.
As demonstrated in this video, there are many methods to get a job done. While a quick bullet to the brain might be the tried-and-true classic, you can always create distractions, set traps, or just blow something up. Sometimes you might just want a bit of variation because Sniper Elite 3's weird skeleton kill cam looks like it'll get old fast.