Sniper Elite 4, in my honest opinion, is meh.
Sniper Elite 2, I loved and played the hell out of, and Sniper Elite 3 I've beat at least 3-4 times.
Sniper Elite 4? I beat the story in what felt like 10-12 hours, and I remember nothing of it, as the second half didn't phase me, and not to forget a terrible end mission that was more chore than anything.
It's free, though, so it's not like you're paying for it