Hitman emulator?

You mean Hitman GO?

Sure:

https://store.steampowered.com/app/6850/Hitman_2_Silent_Assassin/

It's a game where you emulate being a hitman. Hence it's a hitman emulator.

If you mean "simulator," yes, sort of. See the post above.

But the weird thing about the Hitman series is that they are less authentic sandbox games than pseudo-puzzle games. There's two or three very scripted, linear cinematic ways of killing a target.

Or you can just chuck a screwdriver at every targets' head and break the game's mechanics because it's not really balanced. That's how I cheesed the World of Assassination trilogy.