How is Hitman 2? I didn't play 2016. And have never played a Hitman game at all.
The game is a lot of fun! I can't recommend it enough.
Metacouncil users even voted it game of the year 2018.
There's a Hitman 2 free starter pack on Steam. Give it a try, for a sample of the game.
Do note that this is the intro map, the rest of the locations (both for this, and the previous game) are big maps, with a lot of freedom, a lot of ways to accomplish your objectives. That free small map is more linear than the rest of the game.
Since you are not familiar with the series, as it may be easy to understand, you play as a Hitman, and you get jobs to murder certain targets.
You can do so in a million ways: fake an accident, poison them, kill them from a distance with a sniper riffle, (...). Ideally, you will complete the mission killing only your target, without being spotted, and without anyone suspecting of anything.
In order to do so, you can steal the clothes of other people to infiltrate locations without arousing suspicion, pick locks, find different entry points, (...).
It's one of the rare games where replaying the maps over and over is actually a lot of fun, because you can do things radically different.
Plus. each location has different challenges, special events (like seasonal missions and elusive targets, the later missions where you only have one chance to complete your mission), extra missions, and user created content.
You also have the Sniper Assassin Mode (that currently has a single map, but more are coming) that is played exclusively by using a sniper riffle to shoot targets.
Here's a trailer for the free starter pack: