"Reincarnated as a sub-character of a video game that I used to play!?"

After saving a girl and then getting run over by a car in the process, and "I" was reincarnated as"Rex" in a video game world. A handsome Rex with skills in all fields, but he is a helper character in the early stages. Tho Rex has a high level, balanced skill set and multitude of abilities…He's useless in the later stages of the game!!

I decided in the face the fact that I'm useless in this fantasy world

So let's relax by letting the main character of the game do both "saving the world" and fighting for his life against monsters"!　

This is a story in which an ordinary person looking for a "hero" but instead becomes a hero who saves the world for some reason!

The story is set in the continent of Jugdral, home of the descendants of the Twelve Crusaders. Lord Sigurd is the hero for the first generation, fighting an invasion from Verdane and helping out in the lands beyond. Sigurd's son, Celice continues his father's legacy in the second generation, where he rallies an army to defeat the Grandbell Empire. From Baka-Updates: Based on the Super Famicom strategy game, Fire Emblem 4 features the son of Lord Byron of Chalphy, Lord Sigurd. Bandits from Verdane made an attack while Grandbell's armies were away, and now Sigurd rallies the remaining forces to drive the bandits out so he can save his friend, Adean... Little does he know what he leads himself into will lead into a tragic turn of events in the face of Grandb.

They were childhood friends, and she had always been more powerful than him. But when they accidentally traveled (summoned?) to another world, it was finally time for him to become the knight in shining armor! He had to find her first though, since they were separated... Come and witness his fight to be better in a crazy world where monsters roamed and technology was so advanced your amputated limbs be restored to perfection...

Konoe Yuuto was summoned to a different world where slave trading is legal. There, using his "Skill Taker" cheat ability, he steals the abilities of monsters he defeats, and starts building a slave harem while hoping to live a carefree life after retirement.

This is a world where evil creatures are gradually rampaging. However, the evil creatures are strong, they all disappear after this mental hospital, and even without dignity, they are reduced to ingredients and pets. This is the Green Mountain mental hospital, where talents are abundant and strong people are surrounded. In this regard, the seriously ill Lin Fan, who is carrying the system, said: I am definitely not a mental patient, I am a normal person who likes to cultivate. Usually is to touch the socket, climbing high voltage box, thunder days standing on the rooftop to the heavens dance a stick method.

Lin Feng travelled through worlds and even obtained an overpowered system, but he still faces a pressure as huge as a mountain.

System’s main quest:
Lin Feng is to create a school; establish history’s number 1 sect and Lin Feng himself to become the number 1 founder.

To become history’s number 1 founder, Lin Feng started to work hard.

“Your name is Shi Tianhao? Natural born sovereign roots but it was stolen by your cousin? Now being raised in a little village your father placed you in? Come come come, follow your master and we’ll let those people know that justice that is owed must be returned!”

“Your name is Xiao Yan? A genius of the past but a loser now? Even your fiancé came over to humiliate you by asking for a divorce? Come come come, follow your master and we’ll let that brat know the meaning of: don’t bully a youngster just because he’s poor!”

“Your name is Zhu Yi? The son of a marquis but you’re being suppressed by your father? Your mother was a saint but she was assassinated? Come come come, follow your master and we’ll let your dad know the meaning how problems can be solved with your fists…no, with reasoning!”

Park Tae-Jun Comics Company, Kim Soong-Nyung / Gwangsan

Shin Kim, the rare serial killer who shook the Republic of Korea!

Ji-hoo, who lost his family to Kim Shin, meets another victim, Du-seok, and is trained as a human weapon. And he goes to prison on his own to kill the killer with his bare fists…

‘There has been no execution in our country since 1997. Shouldn’t someone be doing it?’

An ordinary office worker, Akira Ichijo, was attacked by a Minotaur on his way home from work.

In the next moment, he woke up in his office desk, Akira was resurrected from death, inherited his level and status, and possessed a unique skill called "Return from the Underworld" that allowed him to restart his life at a certain time.

Now Akira makes full use of his skill and everything he had to search and survive with his childhood friend Nao Nanase to face this cruel world!!

Young Alice Estevan has a secret. She was actually reborn in "The Tyrant's Silver Flower", a hardcore, tragic BL where she'll be killed for abusing the male leads! Luckily, she still has time to avoid that fate by liberating Edwin, one of the male leads, from the tower he's trapped in. And though she succeeds in getting the key to free the boy, there's just one problem: he hates her guts! With the threat of death looming ever so closer, will Alice win Edwin over and earn her happy ending?

From MangaHelpers:
This manga is related to the "Date A Live" novel and anime. It features members of the AST (AntiSpirit Team), a special squad devoted to fighting spirits. Okamine Mikie idolizes her superior AST member, Tobiichi Origami, and may be in love with her as well. Unfortunately, Origami seems to want nothing to do with her. One day, they end up heading toward an explosion that wasn't caused by a spirit. Instead, it was caused by a girl named Ashley Sinclair, who transfers to their school shortly after the incident!

The future cannot be changed! In 2019, former track and field club member Maki Makino meets a mysterious man with sunglasses on her way to school who saves her life. That encounter connects her to her past and future... Presented with overwhelming power, a 'boy meets girl' story opens here with unpredictable results!

Set about one year after the ending to The Fable.
Akira and Youko are forced to abort their latest mission due to the Covid-19 pandemic and return to Osaka to continue their quiet life as regular civilians but the peace is not to last.

Ding, the host has opened the invincible field! As long as the host is invincible in the field…!” As a nerd, Chen Changan travels through the fantasy world, facing countless monsters and ghosts from the outside world, Chen Changan decided not to leave his invincible field before becoming immortal. When he is bored, he occasionally raises a few cute and sweet apprentices, and accidentally cultivated them to become leaders in the spiritual world, which turned the world upside down.

Jungho is bullied to the point of self-harm, until one day, his prayers are answered by Mephistopheles, the archdevil. Mephisto offers Jungho magical powers that would allow him to take revenge on his bullies, and in return, asks for his soul. It's an easy choice for Jungho, who thinks nothing can be worse than the living hell that is his life. But what he doesn't know is that there are greater forces at work, and that he is but a pawn in a much larger game played by angels, demons, and exorcists.

Azumi focuses upon the life of the titular young female assassin. The manga begins an indeterminate number of years after the Battle of Sekigahara.
As Azumi begins her duty, the manga introduces its characters into mainstream history. Many of the early missions that Azumi undertakes are the assassinations of the prominent supporters and generals of the Toyotomi Clan, against whom Tokugawa Ieyasu expected to again go to war. The manga 'reveals' that many of the Toyotomi leaders who conveniently died of diseases or accidents prior to the final confrontation between the Toyotomi and Tokugawa were actually victims of assassinations by Azumi and her comrades, thus indicating to the reader when the events were taking place.

Note: Won an Excellence Prize at the 1997 Japan Media Arts Festival and the Shogakukan Manga Award in 1998.

Meet Sefiria. She may be just a baby now, but she holds a dangerous secret — she has memories of her previous life as a Japanese salarywoman. Anyway, yadda yadda yadda, she died, got isekai’d, bada bing bada boom.

Now for the meat and potatoes of things. After experiencing the hell of living in such a rigid society like Japan beforehand, Sefiria wants to avoid making that same mistake in her second life. That’s when she remembered a famous saying back in her previous life:

“At ten years old, you can be a prodigy. At fifteen years old, you can be a genius. At twenty years old, you’ll just be a normal person.”

While the new world she was born in considers adulthood to start at the age of 15, Sefiria has a repository of knowledge from her old life to help back her up. Can she become a prodigy at an early age, revolutionize her world, and ensure herself a slow life that any Japanese reader would love to self-insert into?

Ha Jae, who’s contemplating death on the rooftop due to bullying. A senior appears before him and suddenly pushes Ha-Jae off?! But, he wakes up safely in the Nurse’s Office in school. Ha-Jae’s retaliation against the bullying that the delinquents have started again ends in failure…

But, Siwoon appears before him yet again and coaches Ha-Jae to defeat the delinquents in one strike using his fist.

The presence of the Murim appears hidden under what seems to be an ordinary school, and the perilous adventure to the world of Murim begins.

The greatest warrior of the Boulder Axe Tribe, Urich.
He accomplished what others in his tribe could not, and went beyond the ‘Sky Mountain Range’.

What he saw beyond the mountains was,

Different clothing being worn, different languages being spoken,
and unfamiliar people in iron-clad armor.

“So, the realm past the mountains wasn’t just a spirit world for the dead!”

An uncharted world, and the one who faces it,

Barbarian Urich is headed towards the civilized world!

Tokonatsu Taichi took the summer Koshien by the storm as a sensational ace pitcher, with a full arsenal of pitches including a 98 mph fastball. But on the way home from the game, the team bus suffered a tragic accident and Tokonatsu Taichi lost his life... Only to be transported to a new world where all international conflicts are resolved by a game of baseball. Unfortunately, the country he landed in was the weakest, and had seen gradual loss of its resources and people to neighboring countries. Can Taichi turn their fortunes around?

Strange things are happening all over town, and Amano Kouichi's having nightmares again. Several clans are spurred into action as the past gradually resurfaces, while Kouchi and his obsessively devoted younger brother Jun keep having inexplicable encounters that those around them seem to know more about than they're letting on.

What, exactly, is being set into motion, and how do the Amano brothers fit into the picture?