the ORIGINAL five nights at freddy's, not the sequels
THE GAME[]
The power mechanic really puts tension on players as they play, as they can't really use much devices (doors, lights, tablet) when they're low or trying to conserve. The addition of Pirate's Cove sets extra tension on the player, since they can get caught up with other things and forget about it.
That's it because I typed this before and it was L O S T WHYY
THE FANBASE[]
if i had to describe it in one word
cringe