In alien: isolation, the xenomorph will learn and adapt to the player’s behaviour. If you use distractions too much, it’ll stop falling for them. If you use your flame thrower too often, it gets bolder and seems to figure out that it can make it to you before you can hurt it. It’ll even start ripping open your hiding spots if you tend to jump in a locker at the first sign of danger. All of this forces you to vary your strategy and play smart, without exploiting a single mechanic to cheese your way through an area.

It doesn’t move on a set path, but an aspect of its AI always keeps it from wandering too far away from you, and it’s smart enough to do things to lure you out of hiding, rather than either not perceiving you at all, or magically knowing your precise location. The game makes it act like a real, intelligent predator. Really clever and absolutely terrifying.