Description:

Naofumi Iwatani, an uncharismatic Otaku who spends his days on games and manga, suddenly finds himself summoned to a parallel universe! He discovers he is one of four heroes equipped with legendary weapons and tasked with saving the world from its prophesied destruction. As the Shield Hero, the weakest of the heroes, all is not as it seems. Naofumi is soon alone, penniless, and betrayed. With no one to turn to, and nowhere to run, he is left with only his shield. Now, Naofumi must rise to become the legendary Shield Hero and save the world! (Source: One Peace)

Description:

The year is 2800 and Lufas Maphaahl – The Black-Winged Tyrant, Great Conqueror, and leader of the Twelve Heavenly Stars – has returned. A man wakes up in the body of his MMO character 200 years after her defeat during an player-made event in the game, Exgate Online. Now, he's stuck in her body. But this isn't a game, it's real. With her reign long over, and her legacy one of fear, Lufas must journey through the world of Exgate, looking for answers, possible comrades, and all the monsters her “death” unleashed upon the world... (Source: J-Novel Club)

Description:

Iris, an otome game addict with no time for romance, gets hit by a truck after getting out of work–but instead of dying, she finds herself in the world of a game she'd played just hours earlier. However, she's not reborn as the game's protagonist, the main heartthrob of the harem. Instead, she starts her new life as the antagonist, right at the moment she's being sent to live in a nunnery–for the rest of her life! (Source: Seven Seas Entertainment)

Description:

Tagami Yusuke, led by a mysterious voice, is summoned to another world, "Caltsio". He was just a young, video-game lover, but Fate decided to make him become the "Evil God of Calamity" of this world, obtaining the ability to create and customize everything. (Source: MU)

Description:

Thought your life was bad? Sometimes, death is worse. There is no salvation, peace, nor god waiting to receive you into their care. But wait, a god? Maybe you are talking about that big black ball stuck in the room with you. Now you are thrown into a game, fighting green aliens and robot monsters for the chance to survive. When Kei Kurono is killed, he thus finds himself caught in such a game; a test of his skills, morals and will to survive. His life is not his own, his death spat and trampled upon over and over again. What happens if he does not listen? God knows. A word of warning: Gantz is not for the faint-hearted, but neither is it as simple as it looks. Gore, rape and violence is rampant, as are portrayals of greed, violence, and all the ugliness that one sees in society today. (Source: MAL Rewrite)