Madoka Magicaaaaaa I’d suggest give it at least 3/4 episodes

The Perfect Insider might be up your alley. Group of college students trapped on an island with a killer. Very mind-screwy.

I'd say happy sugar life is a pretty interesting one that not many know about

Monster

Not necessarily thriller but I think Psycho Pass would fall into this and it definitely has some thriller scenes.

Kaiji: Ultimate Survivor - this anime inspired the creator of the TV show "Squid Game". A psychological/thriller and gambler anime.... but Kaiji is levels above Kakegurui.

Code Geass - you'll find it very similar to Death Note. Especially because of the MC and his goals. Masterpiece type of anime that's usually at the top of all the 'all-time' lists.

Classroom Of The Elite - If you like genius MCs, mind games and manipulation, you'll like this one.

The Promised Neverland - an excellent psychological thriller, also has that mystery element. Though you only need to watch season 1.

One Outs - this is a psychological thriller disguised as a sports anime. Think 'Yagami Light' as a baseball pitcher.

* For reference, some of my favorites are Death Note, Steins;Gate, Summertime Rendering, Parasyte, Made In Abyss.

* I've only watched these anime subbed. Cant vouch for dubbed.

Monster (it can be a little slow, it is also long)

The Promised Neverland (season 1 only)

Gakkougurashi (this might be closer to psychological horror)

Tomodachi Game

Higashi no Eden

Talentless Nana

Angels of Death

Rainbow (it has some mature topics)

Try Ergo Proxy and Pluto. Both are cyberpunk-y mysteries with Ergo Proxy being more grungy and Pluto almost more noir-y (?)

More of a reach but you may also like Princess Tutu, Baccano, and Durarara. Princess Tutu is kinda like Madoka where it starts normalish but then spirals (although it spirals in a more meta way). Baccano and Drrr both have a large cast of characters and several plot lines that start weaving back over eachother.

Seeing Perfect Blue and Paranoia Agent at the bottom kills me inside

I’ll recommend Monster. It’s an anime classic.

Angel of Death is watchable, I don't see that one up there.

Shiki should be up there

Gantz (Beware very mature content) ummm could trigger folks

I really liked these and think they would fit what you're looking for:

{Psycho-Pass}

{Terror in Resonance}

{Dusk Maiden of Amnesia}

{Elfen Lied}

{B: The Beginning}

{The Future Diary}

These are maybe less of a good fit, but they're in the ballpark, and I really liked them:

{Shadows House}

{Brynhildr in the Darkness}

{Dorohedoro}

{Speed Grapher}

Also, I didn't really like them, but {Deadman Wonderland} and {Btooom!} are probably worth checking out.

I really really recommend the Higurashi manga or visual novel instead than the anime (manga is faster, visual novel doesn’t have any cuts and an amazing OST). The anime cuts out most of the meat, and meat is crucial in a mystery story. As my favorite thriller I also recommend the sequel to Higurashi, Umineko (manga or visual novel). They both have one of the best soundtracks in gaming and they both are deeply moving stories (it’s the piece of “anime media” that made me tear up more), but the anime really doesn’t do it justice (you can see all the people saying that the second season ruins the story)

Saw all the mentioned! My psychological thriller fav is Monster, my horror anime fav is Higurashi no naku koro ni.

Madoka Magica

Mieruko-chan is also screening currently.

The most relateable psychological horror is Watamote. People are so horrified by that one they can't finish it.

Psycho-Pass

Steins;Gate

Dorohedoro, Terror in Resonance, and psycho pass are done of my favorites

Made in Abyss is a horrific story masked in an adorable art style, don't let it fool you at first. Such an amazing concept and so well executed, can't wait for s2 to come out!

I edited with more additions. They are all non traditional psychological horror. And madoka needs you to watch at least 4 episodes before you think of me as a troll. But it literally has psyhcological thriller and horror in its genre listings

Paranoia Agent

Perfect Blue

My Home Hero

Speed Grapher

Psycho Pass

Glad to find more thriller enjoyers 👍.

I finished Monster 2 years ago, and have since then searched for more shows like it. I’ve watched many psychological thriller animes since then, but I must say that there honestly haven’t been anyone that similar to Monster, it’s a very unique series. But I can recommend some other great thriller ones.

These are some of the series I watched right after monster: Berserk, Death Parade, Pluto (another Urasawa adaptation). I also started reading 21th century boys, which is a thriller manga by Urasawa that kind of gives of a similar vibe as Monster.

Ghost Hound 

Shiki

Shinrei Tantei Yakumo

Erased

pluto is so good never heard anyone else speak and it

zankyou no terror Is a good one

The Garden of Sinners (Kara no Kyoukai) (a series of movies).

Overall it's a fairly dark story with moments of action, violence, some blood and gore alongside an ongoing mystery and a heavy supernatural element. It can appear confusing if watched in release order (which is recommended for first timers) because the story isn't told chronologically, but a rewatch in chronological order is extremely satisfying and helps to fill in any missing pieces of the narrative.

It's animated by ufotable so you just know it'll look great.

However, the movies were released prior to 2018 so maybe you've seen them already? It's not that well known (it deserves to be though!) so there's a fair chance you've not seen it.

Death Parade is a cool one. Not that gorey. But very nice story. And the art is next level too.

Monster

Psycho pass

Dang most of what I would recommend already stated!

Maybe try out

Ergo Proxy

Paranoia Agent

Eden of the East

Kaiji

Id:Invaded

Link Click!

Neon Genesis Evangelion, The End of Evangelion movie, and then the 4 Rebuild movies.

People have written their thesis statement on it, and still do lol
If it makes you examine yourself too much, just keep pushing through.

Nothing comes close to {Steins;Gate} imo, haven't seen Monster yet though

Erased, The Promised Neverland, and Made in Abyss.

Don't forget that Berserk is a psychological thriller through and through, it's just subtle about it in the beginning.

Also, watch School-Live! and dont read a synopsis or anything, just jump right in for the best experience.

Edit: I almost forgot, Shinsekai Yori (From the New World) is a must-watch.

{Monster}

{Death Note}

{Death Parade}

{Paranoia Agent}

{Blue Literature}

{When They Cry}

{Kaiji: Ultimate Survivor}

{Puella Magi Madoka Magica}

{Psycho-Pass}

Serial Experiments Lain is a must

Flowers of Evil

Paranoia Agent

Perfect Blue

Serial Experiments Lain

Texhnolyze

Psycho-pass

Moriarty the patriot

Ghost in the shell 1995

Madoka magica

Id invaded

Madoka Magica (looks can be deceiving)

Made in Abyss (looks can be deceiving)

Parasyte

Dorohedoro

Kaiji

Tomodachi Game

For something a bit different, Ghost Stories (English dub, trust me)

• Monster
• From the New World
• Gankutsuou
• Paprika
• Perfect Blue (some sexual violence in this)
• Jin-Roh

I’ll second Kaiji, too.

Monster

Psycho pass

Death note

Erased

Steins; gate

Terror in resonance

The promised neverland

Berserk

Shiki

Fma:b

Code geass

Serial experiments lain

Serial experiments lain, Madoka Magica, Made in abyss

Def. watch Erased it's one of my fav. thrillers. Also watched Terror in Resonance recently and finished it in one go :)) Enjoy

Erased. A hundred times over Erased.

Higurashi no Naku Koro ni

(HiDive) 2006->Kai->Rei

(Crunchyroll) Gou->Sotsu

Two full-length mysteries, a main one and a sequel, averaging 40 episodes each. The definitive anime mystery/horror.

But if you want something short, try Gakkou Gurashi. Do NOT look it up in advance. No Pictures, no summaries, no reviews. Watch the first episode all the way through before making up your mind.