You've gone into the darkness willingly, so here's what to expect:

At first, the game mechanics will make sense — you avoid or confront enemies, solve puzzles, absorb the environmental storytelling and horrific atmosphere.

But as you descend into the depths, so too do you descend into madness. The once-cozy confinement of a crumbling Egyptian tomb transforms into a nightmarish maze of weeping forests, claustrophobic sewers, and rusted industrial complexes.

Gods want entertainment, tugging at you from all angles, seeing how long until you break.

Monsters may wish to be your friends — if your reputation is high enough. Walls are merely a suggestion. Death is a ladder to a nonsensical suburban town filled with anxious, skinless creatures. If you flush the toilet 4 times, you might get poisoned.

And remember, most of all:
Revel in fear.