There's another thread just like this one posted 2 hours earlier in this same community, fyi.

Just gonna copy my comment from there:

The Isle is honestly pretty bad in many respects. In fact, it's such a mess that I need to clarify which version I'm even talking about, because there is an OG version and an on-going complete rewrite, prompted by them having fired their only coder and no longer being able to understand their own codebase.

The OG version was special. It was very simple, quite buggy and in a constant, obvious state of plans-and-hopes (being EA), but it had a unique atmosphere - the only true survival-horror to date, as far as I'm concerned/aware (only rivalled by some of my experiences playing DayZ, back when it was still an Arma 2 mod).

Playing a herbivore, resting/hiding in a bush in the pitch-black darkness of night with only limited night-vision letting me see my immediate surroundings and footprints on the ground, the sound of a massive, rumbling carnivore sniffing for traces of food was quite a thrill. Not to mention the moments after when a pair of jaws around my size suddenly emerge out of the darkness.

That kept me playing.

Then they stopped working on that and began their rework from the ground up. The rework (which they call EVRIMA) has (or had) no day-night cycle (always daytime), went from being set in an arboreal environment to tropical jungle, and had two playable dinosaurs (one herb- and one carnivore) of about equal size. No creepy nights, no asymmetric gameplay, no horror elements, different feeling in both how it feels to play and how it looks, and it also ran like crap on any device.

They're slowly working on it; it has some more dinosaurs now etc, but last I played, it still didn't feel the same and it was still buggy and severely incomplete. What emergent horror elements one might get out of the reworked version I feel are but shadows of what could have been.

And yet there's none other like it.

Edit: I believe the current version does have night-time, but it doesn't (or didn't until recently) have night-vision and IIRC the nights are not as horrifying.