Highschool of the Dead Another Corpse Party: Tortured Souls Higurashi When They Cry Parasyte: The Maxim Elfen Lied Monster Vampire Hunter D Hell Girl Yami Shibai: Japanese Ghost Stories Puella Magi Madoka Magica Shadow Star Tokyo Ghoul Mononoke Shiki Pet 商店 of Horrors Paranoia Agent Serial Experiment Lain Blood+ Ghost Hound Devilman Gantz Blue Gender Pupa (Scary in 更多 ways than one)
Tokyo Ghoul Black Butler Another Death Note Deadman Wonderland Blue Exorcist (If that counts) Parasite Hellsing Ajin Corpse Party Akame ga Kill I can 列表 11 easily. All of these I watched.