If you liked the Higurashi no Naku Koro ni Kai anime, the Anime-Planet community thinks you'd like:
Area 11 is still under Britannian rule and the Elevens remain brutally oppressed; what’s more, their saviour, Zero, is nowhere to be found and all of Britannia believes the rebellion is finally over. Elsewhere, having lost the battle, Lelouch sets his sights upon winning the war – but the task is no easier since the Britannian forces have learned some valuable lessons all of their own. Not only have they discovered his identity and captured many of his Black Knights, but they now manipulate the memories of all of his friends. Worst of all, they have taken the most precious thing in his life – his dear sister, Nunnally. With his hatred for the Britannians stronger than ever before, Lelouch must now recuperate his forces and bring their rule of terror to an end.
Simply put if you like an anime that ties up the loose end of their first series Higurashi no Naku Koro ni Kai and Code Geass R2 are prefect. Picking up on a seemingly unrelated incident leaves the audience wondering what the hell happened. But as the stories progress it become clear that -if enough thought is consider- it becomes almost scarily well thought and developed. And you come to realise minute thing that the first season showed played a large part in the outcome, what is the outcome? you'll just have to find out...
Much to the annoyance of Kei, he and his childhood friend Katou have died, having been torn apart by a train. But rather than finding themselves at the gates of heaven, the duo materialize in a room full of strangers and a giant black sphere known as GANTZ. As if dying once wasn’t bad enough, the occupants of the room are then forced to embark on dangerous missions to kill strange aliens; missions that very few return from. Now, Kei, Katou, and a well-endowed friend must fight for their freedom with an arsenal of guns, high powered suits, and a very low chance of survival.
Both of these animes have quite high doses of horror and gore in them (though more Gantz than Higurashi Kai) However they also both focus more on the intellectual and psychological aspects of things like murder and death, messing with your mind more than plain horror titles.
Nishi has been in love with Myon since he was 9 years old. They both had feelings for each other, but due to Nishi's cowardice their relationship never became more than friendship. Now, in the present, Nishi is 20 years old and aims to be a great manga artist; but he still loves Myon. After years of being apart they meet again, but she tells him that she's thinking of marrying her boyfriend. Nishi is still a coward so he accepts it and wishes her luck. While they're talking at her older sister's restaurant a pair of yakuza walk in looking for their father. One of the yakuza starts harassing Myon and out of anger Nishi chooses to finally take a stand -- but he is shot and dies. Now, in limbo, he chooses to live again; but will he really live any differently than before?
This may seem like a stretch, but I believe that each show has a similar mentality that "will can defeat fate," that one shouldn't give up, and they both are centered around 2nd chances. Although completely different in terms of story and animation, they share a similar message.
In the streets of Tokyo, a new menace has surfaced: Shounen Bat, a young boy who wears golden roller skates and a baseball cap, and likes to whack people on the head with a golden baseball bat. These seemingly unconnected and random attacks soon become a police investigation... but after all is said and done, is there a pattern to this chaos?
Want a mystery that will leave you shocked and confused... Both these anime have a MindF*ckish element to them, making it hard to predict what will happen in the animes. Paranoia Agent however, is short and is as much as a thriller as Higurashi no Naku Koro ni Kai but both are very good and deserve mentioning