I do like it when games have customisable difficulty. Dishonored 2 is a notable one, being able to tailor lots of different aspects to make the game harder or easier where you want. For example, you could make the stealth much more challenging by making yourself visible while leaning, increasing enemy perception and making it more likely that they'll look up. Simultaneously, you could also make the combat more forgiving, limiting the number of enemies who can attack you at once and making them more likely to flee in panic when they start losing.
Wow, that sounds awesome.
Yet another reason I need to get around to the Dishonored games one day...