Hope's Peak Academy is an elite high school that accepts only the most talented students. Individuals who successfully enroll receive their own unique titles, suitably reflective of their skills and traits. Of the fifteen candidates admitted to the peculiar school that year, Makoto Naegi is a completely ordinary individual who has been accepted by sheer chance, with the title of "Super High School-Level Luck." Naegi and his fellow classmates are initially ecstatic to be chosen to study at this prestigious institution, but these feelings of happiness are short-lived. They are soon confronted by Monokuma, the principal and resident bear, who traps them inside the school. The pupils' hopes of escape and graduation hinge on one of them successfully murdering one of their peers without being discovered. However, if the killer is caught, he or she will be executed, and the remaining survivors will be left to continue the deathmatch until only a single victor remains. [Written by MAL Rewrite]

Episodes included in the manga's seventh and tenth volumes.

Following a cataclysmic nuclear war, the world teeters on the brink of complete destruction. Civilization is polarized into a degenerate society where opposing packs of marauding scavengers prey on helpless, homeless nomads. For those who are lucky enough to survive the constant brutality and danger, it is a bleak existence. Life an death blur into abstractions. The only hope left for mankind is to find a hero worthy of becoming the next "Fist of the North Star" - an enlightened warrior - who is capable of leading those with the will to survive out of this barrenness into a new world. But in this savage no-man's land of shifting loyalties and power-hungry demi-gods, heroes are in short supply. 

(Source: AniDB)

After years of fruitless war between the four realms of Gamindustri (Planeptune, Lastation, Lowee and Leanbox) over Share energy, the source of their strength based on how much their people have faith in their goddesses, the four CPUs that rule over them have finally signed a friendship treaty. The treaty bans any attempt at claiming Share energy through military force, in hopes of bringing peace and prosperity to their worlds. Yet, a month after the treaty, Neptune, the CPU Goddess of Planeptune, spends her time goofing off and playing games rather than doing her job, leaving her land's Shares plummeting. Choujigen Game Neptune The Animation follows Neptune and her friends' attempts at raising Shares, while dealing with an external threat that could spell the end of both the Goddesses and Gamindustri itself...