A Concept, A Voice, A Word, A Reason

Sex

Love can be scary.

uncensored human gore is usually pretty good at making a game infamous
sad satin did that and hey, people still talk about it. unfortunately.

Really? Haven't heard of that. Tho, I guess the tone is also important.

Probably everything slowly disappearing, like the music slowly loses more notes overtime until its silent.

Hm, that could work.

while walking in a hallway, a text saying "It's still behind me."

or just entering an abandoned house it says "you found a new entity!" while nothing is still there

Hmmm, this second one, sounds like it'd be an entity hunting game.

phasmaphobiq

Perhaps, just less ghosts, and the methods depend on who you are.