What really lures people in past the first FNaF is the lore behind it. It may not seem like it on the surface, but there is some relatively deep lore that people have been trying to figure out for months. It is rather interesting. I've never been much into playing them myself, mostly watching Markiplier play through them, but I must say I'm curious for FNaF World. I'm a bit of a sucker when it comes to more traditional JRPGs.