1. Dangan Ronpa Kibou no Gakuen to Zetsubou no Koukousei ダンガンロンパ 希望の学園と絶望の高校生  1 2 3 4 5 6 Spike Chunsoft
Hope's Peak Academy is a government-funded private high school recognized all across the nation as the cradle of hope and prosperity, providing a complete education for "ultimate" students of all stripes.
Thanks to a national lottery, one extremely lucky but otherwise ordinary student—Makoto Naegi—has been chosen to attend this prestigious institution.
But when Makoto arrives for his first day of class, he suddenly falls unconscious, and when he wakes up he finds himself in a classroom within the school—with the windows barred and the doors locked. As he explores the abandoned, dirty halls, it becomes clear that something is very wrong. He and his new classmates make their way to the gymnasium, where a demented robotic bear, calling himself Monokuma and claiming to be the school's headmaster, makes a declaration: "You're all going to be living here from now on. If you want to go free, your only choice... is murder."
And so... fifteen high school students gathered from across the country have been imprisoned. Their strength, their commitment, their very humanity will be tested time and time again. Why must they clash in these class trials? Who's the mastermind behind it all? And what is this shadowy figure really after? The battle against the looming, invisible enemy known only as despair is about to begin...
Game is localized and has English reviews of which I covered only the tip of the iceberg - untranslated vn sources
2. Jinki Extend Re:Vision Jinki Extend Re:Vision  Giga
Akira is a normal student who falls in love with his classmate Akao, who is also a miko of the nearby shrine. One day while walking together in the nearby forest, they come upon a mysterious container. They meet a man with murderous intent and a group of robots. This was an omen of the ‘lost life phenomena’ and the intense battles with the ‘Jinki’. Will they be able to survive this battle?
3. Kazegahara Gakuen Spy-bu! 風ヶ原学園スパイ部っ！  Sputnik
Kyouichirou belongs to a strange club at Kazegahara Academy called the ‘Spy Club’. It’s not actually a real club, but an unofficial one. The club members are all very eccentric: the club leader Chikae, unrivalled in leadership; his childhood friend Karin who is a hacker; super-mechanic underclassman Uta; and reckless, ex-gymnastics ace Haruna. They go around the school every day, completing various missions. One day, a strange person by the name of ‘Ghost Dog’ who causes mischief in the school. They start a mission to uncover ‘Ghost Dog”s true identity, but the student council is watching their every move in the shadows…
Game lacks polish a lot and only starts to get interesting by the end due to case developing into parallel world connection.
There’s a saying that goes: “Those who disturb the love of others should be killed by a horse’s kick”. However, it’s not only people that are obstacles in love. There’s lack of money, lack of time together and other little accidents that threaten romance. And of course, there’s actually no horse to kick people. So that’s why the “Kicking Horse Rhapsody” is here! They’ll get rid of all the nuisances so couples can focus on furthering their love. Souta realizes that he’s surrounded by three attractive girls within the group. However, how can he possibly fall in love with a girl when the other girls will be jealous and try to get in their way?
There is an English review.
5. Nanairo Kouro なないろ航路  Journey
Sakuta is quite hard done by at the moment - his parents have left the country so he is currently homeless. One day, he is walking down the street when he feels something wet fall onto him, looking up, a young girl named Enishi falls onto him too. Enishi claims to be an apprentice goddess of marriage and tells Sakuta that what fell onto him was actually "God's Pheromone" which means that every girl he meets will fall in love with him and that this pheromone cannot be collected until he falls in love too.
Just after this, Sakuta saves a rich girl called Mirai from some thugs and she falls in love with him (due to the peheromone's power). Then she decides to let Sakuta transfer to her school as a reward. However this is no normal school, Mirai attends the Princess Mary - a high-class school on a cruise liner!
Now his new life starts, what will happen to him now?
I've yet to encounter a single decent work centered around pheromone. And it's not this one. Opportunistic harem-oriented kusoge, as expected.
6. Ren'ai Saimin ~Tsun na Kanojo ga dereru Saimin~ 恋愛催眠～ツンな彼女がデレる催眠～  C: drive
Takumi is a guy who always helps those in need. A person that he helped rewarded him with the ability to use hypnosis. However, he has no desire to use this for his own personal gain. However, one day, the mood has turned tense due to the banning of love within the school. He realizes that those girls opposed to love actually are afraid of being hurt in relationships, so he decides to use his ability to make all his classmates become honest with their feelings. Everyone goes works well, except that 5 girls all confess to him… and they’re all tsunderes!
Hypnotism is not any better than pheromone. It always ends up a harem nukige.
7. Shaman's Sanctuary -Miko no Seiiki- しゃーまんず・さんくちゅあり－巫女の聖域－  Alice Soft
Post-war Japan makes religion a mandatory part of education to heal those with wounded hearts. A few decades later, Japan is 99% religious with many different religions, some of which cause problems with their illegal recruitment of followers. The government decides to unite all the religions by selecting the ‘god amongst gods’. Itsuki has the power to heal injured people. His childhood friend Mizuno knows about his special ability since he saved her in the past and she persuades him to join the battle. Itsuki summons protection mikos to battle with mikos from other religions. However, there is an unusual side effect where he gets sexually aroused when he uses his powers.
There is an empire controlled by devils. They have an epic battle against "five countries of virtue," but the battle never seems to end because of a barrier between two sides created by goddesses. One day, a group of devils successfully destroys the barrier and invades their enemy. However, no one knows yet that this attack will be the trigger of a devastating war...
TBS has English reviews
9. Shiei no Sona-Nyl -What a Beautiful Memories- 紫影のソナーニル -What a beautiful memories-  Liar-soft 1 2 3 4 5 6
The year is 1907. The 20th century is still young.
This is a world that experienced a 19th century very different from our own. A world of innumerable steam-powered Engines. The unnaturally rapid development of this steam civilization filled the air with smog, robbing humanity of the blue skies they'd once known.
There is one place in particular where the sky is darker than anywhere else: the ruins of the Engine city New York, perpetually shrouded in grey clouds and polluted rain. Five years ago, a mysterious disaster known as the "Great Disappearance" reduced this entire metropolis to a deserted, crumbling wasteland. Sealed off from the world by the United States government, it stands in utter silence. Not a single soul now walks its streets.
But today, a woman named Elysia quietly sets foot inside it - guided by a singular purpose. Her destination: old Manhattan, said to be the epicenter of the catastrophe.
Unbeknownst to her...
There is a place said to be the city's "Underground." This is an enormous subterranean realm, permeated with a dim purple light. No one on the surface world knows of its existence. In this place, the Skyscrapers that crumbled five years ago still stand tall; but their forms are warped and twisted. "Underground New York" is a place of black and violet shadows. A prison with no exit. And beneath its unnatural "sky," the men and women who vanished five years ago still exist...
Cowering in fear of the seven monsters known as the "Messengers."
Suffering terror, agony, and death at the hands of the "Messengers."
They linger on in this twisted underground city, as if waiting for something.
A girl named Lily sets foot in this place, her mind devoid of memories. There is only one thing she's certain of. She doesn't have a reason. She doesn't know who or what awaits her. She doesn't even know why she feels this way. But even so, she's absolutely certain.
"Manhattan. The ends of the violet sky."
"I have to go there. I'm the only one who can."
─The girl sets off for the tower of violet shadow looming far in the distance.
─With every step, she finds the shades of those yet to fade away.
─She isn't aware of the tears she sheds.
There are English reviews
Uchihama Academy has seen an increase in enrollment in recent years and as a result, a new school building will be constructed. The story takes place during the final school festival in the old school. All the club leaders decide to give it their all to make this the best school festival. Sou is a member of the notorious astronomy club, which basically solves the various issues in the student council's place.
On one day, he stays in the school late at evening because he got slightly injured by the judo club and is healing his wounds in the infirmary. Suddenly, the building shakes. Shocked, he runs up the stairs to where the shaking seems to have centered, and there he encounters a mysterious naked girl, whom at first appears to know him. On the next day this girl, Yui, seeks out the astronomy club, expressing her desire to join.
There are English reviews.
1. Sakura no Shippo ~Sakura Tale Fandisc~ さくらのしっぽ～さくらテイルファンディスク～  Fizz
This is the fandisk to Sakura Tale. It features after stories for each of the 6 heroines from the original game, as well a route for Natsumi. There’s also an extra story featuring a crossover with Asanagi no Aquanauts, however characters from that game will not show up.
2. Ningen Debris ~Konna Jibun ni Dare ga Shita?~ 人間デブリ～コンナジブンニダレガシタ？～  Elf 1 2
The protagonist sees his female childhood friend hugging his male childhood friend on the rooftop of school.
The heart of the protagonist then burns with uncontrollable jealousy. He feels himself betrayed by his female childhood friend, since he has finally noticed that he loves her very much.
The protagonist then begins a revenge strategy, a revenge plan. He wants to hurt the girl, hurt her deeply. He will do whatever that is necessary to hurt the girl and damage her in the same way, or more, that he is feeling damaged now.
And this is the start point of the game...Nukige with English reviews