1. Corpse Party -The Anthology- Sachiko no Ren'ai Yuugi♥Hysteric Birthday 2U コープスパーティー -THE ANTHOLOGY- サチコの恋愛遊戯♥Hysteric Birthday 2U  MAGES. GAME 1 2
Sachiko Shinozaki, tragically murdered at age 7; such a sweet girl, taken away at such a young and tender age! Sure, she may have reacted by becoming a bloodthirsty, vengeful spirit responsible for the deaths of countless other children, as well as their erasures from history, but everyone knows that in her heart of hearts, she's just an ordinary, innocent little 7-year-old... right?
Well, no. Because you see, today is her birthday! She'll be turning... 7 again, naturally. But in celebration, she's decided to grant all her victims 24 hours of amnesty from their suffering by gathering them all together for a...hysteric? birthday bash. (What makes it “hysteric,” again?) There will be party games, entertainment, adventure, and most of all, romance!
Why romance? Well, that's simple. Sachiko has only one thing she truly wants for her birthday, and that's to see all the students she's killed (and re-killed, and re-re-killed) put on a romantic comedy show for her amusement. Whether it be a movie, a play, or just some off-the-cuff party hijinks, Sachiko had better see her ships come to pass... or else!
Join Sachiko and the lovable cast of damned souls from previous Corpse Party games—along with a few new faces—as they take the very concept of genre and toss it aside. Prepare to experience terror, discomfort, joviality, and confusion in equal measure as Heavenly Host Elementary plays less-than-heavenly host to cooking contests, co-ed mixers, interpretive stage drama, traditional party games, and Lovecraftian horrors alike. Because you know what they say: Hell hath no fury like a 7-year-old girl bored...
There are English impressions
2. Kono Bushitsu wa Kitaku Shinai Bu ga Senkyo Shimashita. Portable - Gakuen Summer Wars Henこの部室は帰宅しない部が占拠しました。 ぽーたぶる 学園サマー・ウォーズ編  BOOST ON
A group of energetic students not belonging to any club (going home club) goes to a field trip during summer vacations and skirmishes in competition with the club of military enthusiasts.
Light novel spin-off
Taking place in Japan at the end of World War II. Devastated in the aftermath of defeat, the Japanese government complies with the Allies' reconstruction plan. Japan begins to recover from the loss after a few years, but America and China intricately divide the nation on a municipal level. Eventually, China's military districts become Chinatowns, and places controlled by the United States are Americanized. The many Chinese and American immigrants make Japanese people the minority in their own land. Some Japanese are unwilling to accept this fate and secretly gather their strength to challenge the new system.
A girl named Rose Haibara works at the club Primavera and lends money to Japanese people so that they can rebuild their lives. Meanwhile, Leo Shishigami is best known for his reputation among women. Everything begins to change when that legendary man meets Rose in the spring of 1947.
Game is localized and has English reviews
4. Tantei Opera Milky Holmes 2 探偵オペラ ミルキィホームズ2  bushiroad
More adventures of detectives Milky Holmeswith with new protagonist Ellery Himeyuri now.
Nipponichi, the developer that brings the world all sorts of wacky games are celebrating their 20th anniversary. And instead of doing it with a cake, they do it with Tokuhou, a game that aims to show you the real world, from reality to beyond. The gamer becomes the Assistant Director of the Tokuho Show, Yuzuhara Ryo. He's sent to all sorts of regions in Japan to find explanations for what appears to be supernatural occurrences. The cases you investigate in might include mysterious fires, poltergeist reports, kappas and all sorts of chilling crimes. But you don't have to head into the dark unknown alone, the mysterious co-workers and the cute assistant are all behind you.
There is an English impression
6. Fushikitan Kyuukon Sennen Shoujo 不死鬼譚 きゅうこん 千年少女  Ocelot
Motoki belongs to the news club at Yuzuhara high school. One day, his kouhai Kaede confessed to him and he accepted it, becoming lovers. They started to investigate one of Yuzuhara-chou’s seven mysteries, about the fenced fields, but the club leader Maki started to look like she was being possessed. A mysterious girl who thy met at the dam, Mitsuki, told them that it all stemmed from a bulb (kyuukon) that he had buried.
Novel adaptation rather than a usual game. Should be fine for those who like bizarre mysteries.
7. Hin wa Bokura no Fuku no Kami ~Binbou no Kami-sama Datte Shiawase ni Naritai to Omotteiru no da~ 貧は僕らの福の神～貧乏の神さまだって幸せになりたいと思っているのだ～  Bonbon Company 1 2 3 4
A beautiful girl Yoshino transferred to Academy Touju, attracting the attention of many boys at the school. But rumours spread that any boy that gets near her will fall into financial misfortune and they began to distance themselves from her. Some kind girls offered a helping hand, but were struck extremely hard into poverty. Soon she found herself isolated.
However, Yoshino’s curse doesn’t scare Daichi – he’s already as poor as he could be. She wondered if he was fated to be with her and revealed herself as the god of poverty. She used to be a zashiki-warashi and believed that if the aura of poverty around her were to be completely cleansed, then she would return to normal. He agreed to help her out by staying by her side so that no incidents would happen, but she also wanted him to help those girls who she had unwillingly cursed. Thus begins his life together with the girls at the run-down Sanshunkan dormitory.
There are English reviews
The year is 2238 and due to newfound technology, humans now can choose not to grow old. It is a world of eternal life. Tsubasa readied himself for another school year, the only difference this year being that the swimming club he was part of had been disbanded. His childhood friend Tsubame encouraged him to join the life club, a peculiar club dedicated to searching for ‘life energy’. While he wasn’t sure what that meant, he ended up joining anyway. The club spends its days digging for treasure, eating desserts at Shitoran-tei and running a cosplay fashion show. Most of it was quite random, but it was quite enjoyable. After another day out with Tsubame, he returned home where the streets were eerily quiet. There was a special TV broadcast announcing that there was an asteroid headed on a collision course to Earth and that there was practically no chance of survival.
There are English reviews
9. Ano Hi Mita Hana no Namae o Bokutachi wa Mada Shiranai. あの日見た花の名前を僕達はまだ知らない。  guyzware 1
6 girls and boys create a group called 'Super Piece Buster'. They were unseparated until one of them, Honma "Menma" Meiko passed away and separated her 5 friends.
10 years later, Menma appears in front of her now grownup friend Yadomi "Jintan" Jinta. Menma asks Jintan to fulfill a wish that she can’t remember to move on to the next life. That’s where you come in.
The PSP game has a branching story and multiple endings made just for the game. On top of the visual novel component, this game has a communication mini-game where you can talk to a 3D model of Menma everyday.
"I-I can't, you're like a little brother to me. Besides, I already have a boyfriend..."
"... I'm sorry."
One not-so-special afternoon, I, Tenjou Yukiha, confessed my love to my childhood friend and got turned down.
But before I have any time to grieve, a girl suddenly appears right in front of me.
"Nice to meet you!"
"I'm your daughter from the future, and I traveled all the way back in time to change your life for the better!"
That's how I met my self-proclaimed daughter-of-the future, who changes my entire life.
That was the beginning of it all.
The beginning of my new future.
Mobile game has an English review
Tenebrae is a horror adventure set in a fictional futuristic place called New Island City where a huge incident occurred involving multiple people, some of whose stories the player can experience by playing through each of their perspectives. This game is a first out of planned but cancelled four episodes, and though each episode work as a standalone story, they all share the common core which helps bind the overall story.
In this first episode, the story follows a reportage writer, Seiji Inugami (犬上 征爾) who one evening receives a phone call prompting him that something big is going to happen in New Island City. While reluctant to take a commission to collect the data onsite at first, he ends up coerced into agreement by the caller who blackmails him with something from Seiji's past which he was part of 15 years ago where he witnessed something he shouldn't have. On his way to the city, he ends up meeting his old friend, police detective Kaoru Saegusa who is working on a case involving a series of disappearances. While friendly chatting, they hear what sounds like a sea of screams in the distance. As they look toward it, they see a huge black fog enveloping the area. Thus, the search for answers and uncovering the mystery behind it begins.
PSP exclusive mystery
12. Dai Ni Ongakushitsu e Youkoso!! 第二音楽室へようこそっ!!  Wheel
Masato returned to Japan after 3 years in Vienna with his parents. Immediately after his first day of class at Yonamori Gakuen, his osananajimi Kana grabbed his hand and dragged him to the second music room in the old school building. She welcomed him to the music club, which everyone in the school dismisses as just a group of weird kids playing together. What will happen to his new school life?
Banal charage with tilt into H and bakage
The protagonist has a younger sister named Saki. She’s cute, great at studying and excels at sports… pretty much the perfect sister. They aren’t closer than any normal siblings would be. It’s not like he’s a siscon nor she’s a brocon, or at least that’s what he thought. He wondered if he should fall in love with someone, perhaps his older sister-ish childhood friend Izumi, her baby-faced but big-breasted younger sister Mizuumi, or maybe Saki’s cheeky tsundere best friend Yui. But something seemed to be missing. Something that, unbeknownst to him, had always been close to him.
There are English reviews
Yukito doesn’t have a single relative after a great flood which claimed the lives of his parents when he was small. That was also when his younger sister went missing. One day, he happened to hear in the news that the past records pertaining to the disaster would be available to the public for the 15th anniversary of the event. He decided to return to his hometown of Kugumi village, holding on to the belief that if he checked those records he might be able to reunite with his long lost younger sister that he only faintly remembers.
There are English reviews
One day monsters appear in Kakyou City. The school Chiyoko and Haruka are in shakes like during an earthquake and the window panes shatter all at once. During the commotion, the two rush to the rooftop. They see bodies lying in the street and smoke in the distance.
A strange talking cat approaches them and asks them to become 'warriors' in order to fight against 'Biomonsters'. Panicked, Chiyoko is first to agree. She receives a round gemstone-looking transformation device along with a rather painful needle in the back. She suddenly finds herself able to travel faster than the speed of sound. Together with Haruka they are barely able to fend off the Biomonsters.
The cat tells Chiyoko and Haruka they have to search for more students with the potential to become 'warriors' like them. Over the next few weeks they continue searching for members, however, Chiyoko's reputation as a dangerous person and her lack of common sense causes her to be misunderstood frequently. Beyond that, not everyone isn't so willing to risk their life. Why should they be? This isn't the army. No-one is there to force them to join, or to keep order.
Some reach out to others. Some reach out to their friends anew. Others sit back and watch anxiously or with disapproval. Even as the threat of annihilation grows, their personal worries remain in the air.
The days ahead lay filled with turmoil, large and small.
16. Naka no Hito nado Inai! Tokyo Hero Project 中の人などいない！ トーキョー・ヒーロー・プロジェクト  ALcot 1 2 3 4 5 6
The Tokyo Hero Project was a plan which was implemented two years ago, placing cosplaying heroes in each of the 23 wards to promote public order. But not many people knew that they actually possessed special powers and fought against the secret evil society Black Outsiders (BO) at night.
Koutarou is a poor student who lives by himself. One night while he was making his way to a part-time job, he saw a fierce battle between a cosplayer and someone wearing a kigurumi. Due to the incident, he ended up missing his part-time opportunity and his friend Nagahiko suggested a new one for him. A young girl with a black manteau welcomed him: “How wonderful it is to have you here at the secret society BO group!”. From that day on, he battles against heroes while wearing a mascot character powered suit. Do your best, Koutarou!
There are English reviews
17. Revolver Girl ☆ Hammer Lady リヴォルバーガール☆ハンマーレディ  Kai
The world having turned into a barren wasteland after The Crash, humans now live in small colonies, spending their days in fear of monsters called Deadhezz which roam rampant outside. However, there are those known as ‘Hunters’ who eradicate these monsters as a living. Maria and Kiriko are two such Hunters who are based in Carrier Town. One day, a girl named Nena requested their services as her bodyguards. They readily accepted, excited for a new adventure with high reward, but what lies in store for them?
Despite normal synopsis it's actually a nukige with lots of corresponding fetishes included
18. Shiromiko 白神子 ～しろみこ～  Exception
Kouta was an unattractive soccer club member. After his classmate and childhood friend Youko was suddenly hospitalized, he learned from his mother Fumiko that their family holds a secret power that can cure any disease.
Again, a seemingly normal synopsis holds a dark H-tilt bullying story from a nukige maker company
The gates of Heaven are closed shut; the realm of Hell consumed by flood. And in their wake, countless parallel worlds wither away, one after another. The surviving angels and demons gather at the city they believe to be their final chance at salvation: the floating purgatory of "Tokyo Babel".
Joined by humans, they embark on a pilgrimage across the seven layers of Babel, hoping to ascend Jacob's Ladder in an effort to re-open the gates of Heaven. Their journey would be an atonement toward the heavens.
And yet, their plans fall into ruin as a group of pilgrims -- their minds consumed by madness - set out to lord over the numerous layers of Tokyo Babel with the intention to wreak complete and utter havoc atop the floating purgatory.
Amidst this neverending impasse, a lone youth is saved from the ruins of his devastated world - Tendou Setsuna, a man denied human treatment since birth.
Joining his savior, Lilith - known as the Witch of the Night, he begins his journey across Tokyo Babel...
...yearning for an answer to a single question: Why he still possesses the will to keep on living.
There are English reviews
2. Irotoridori no Hikari いろとりどりのヒカリ  Favorite 1 2
Now finally together in a new world, Yuuma begins living with Shinku. Even though they both love each other greatly, they become flustered when they try to convey their feelings across. There’s also after stories for the other four heroines, along with a side episode for Shinku’s younger sister, Ai.