Erased has that kind of suspense/mystery feel.
Ajin
Devilman crybaby
deadman wonderland
Inuyashiki (I think that's how you spell it)
twin spirit detectives https://www6.9anime.is/watch/shuangsheng-lingtan.49rx
terror in resonance, parasyte, devils note
+1 Parasyte
Shinsekai Yori
thank you everyone lol looks like ill be busy this summer with watching all of these
I need a really good anime that I can binge on ,similar to tokyo ghoul, death note or attack on titan