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)

Description:

Akira and his classmates are on a plane that crashes on an island inhabited by a species thought to have been extinct. Some of his classmates are eaten alive, some kill others in desperation. Now Akira and a few other survivors are trying to stay alive through what seems to be a horrible nightmare. (Source: MU)

Description:

Takahata Shun's day at high school begins just as normal and boring as ever, but it doesn't end that way. After his teacher's head explodes, he and his classmates find themselves forced to play children's games, such as Daruma ga Koronda (a game like Red Light/Green Light), with deadly stakes. With no idea who is behind this mysterious deadly game session, and no way of knowing when it will finally end, the only thing Shun and other students can do is keep trying to win... (Source: MangaHelpers)

Description:

Haiba Sumio is a student at a Tokyo High School with an interesting ability... He occasionally falls asleep and wakes up with premonitions of the future written out on his "Dream Diary". With this ability, Sumio helps out people in trouble before anything bad happens, until one day when his peaceful life completely changes.

Description:

It follows the story of Yasuto Akashi, who skipped school the day the games began and must compete in a separate set of games in order to survive. This series takes place at the same time as part one.