Disclaimer: I will go in detail of this mod, if you've never played it install it now and play with it without any outside spoilers. This is the best herobrine related mod EVER. It stays true to the legend. It's not even a horror mod yet is way scarier than any other cave dweller clone. Herorbine here is not a monster or a supernatural entity, he just watches. Sometimes from far away, sometimes closer. If you've seen him, then he sure has seen you. You can catch him in the corner of your eye, always watching, but when you notice Herobrine, he just disappears. That's not even mentioning how he slowly reveals his presence to the player and leaves you tiny signs that something is wrong. OH AND THE WARNING WHEN ENTERING A WORLD. The warning is the most creative and well executed idea in any mod. If that's not enough you can allow Herobrine to edit your CONFIG FILES. This may not be the best minecraft mod ever, but it sure is high on the list.