Oh also forgot another one: Styx.
It's a pretty neat stealth game, lots of verticality and combat is punishing since you die very easily and some enemies can't be fought at all (but environmental kills are still a go).
Even when it comes to killing people, it often requires that you setup intricate traps or fully use the environment around you.
Only problem it has really is that some sections do feel a lot like a puzzle to be solved with obvious solutions spelled out for you, but the large open areas do make up for it.
I heavily recommend it, especially considering it even has a sequel.
It really doesn't look that great without mods. It requires pretty good specs because they are fucking retarded at optimizing shit (before some patches, there was actually 2 floors being rendered for some reason) and a few areas are terrible for your FPS.
It can indeed look better with mods, but last I checked modding tools for it ain't that great and considering how lacking the base game is, you're not gonna get anything better than a pretty loot-and-shoot game. If you like Diablo with guns (but no skills)…
Last I checked in thief, doesn't happen. They stay alerted forever, at least the competent guards. Dishonored does happen, though but it can take a while.
You're still failing at stealth and being punished for it by being driven back, instead of making progress with bullets\stabs. At the end of escaping, you're not closer to your goal while at the end of combat, you just got an empty room to explore and move at will.
They stop being stunned at the first strike. Unless you want to carry about 5 bombs per guard, it's not a very good strat.
Also doesn't work. They have good reach, movement and reflects. You're better off trying to parry but it's risky.
Doesn't work in the highest difficulties anyway that require killing no one and there's often far more guards that require far more arrows than you can carry around.
Food barely heals you, don't count on it.
Now I'll have to question what difficulty you play at because at the highest one, Garret does down in 3 strikes, the first 2 leaving him at death's door.
They follow noise and mass near you. First hitman had a mission in the jungle with a house where you could find some disguises. If you fired a weapon inside, you could expect almost the entire camp to rush in.