A world known as Gamindustri protected by the divine aegis of the four CPUs and their sisters, the CPU candidates. Even in this world the seeds of evil don't die out, and since brutal enemies along with ferocious monsters that appeared were quickly defeated by the collaboration between the CPUs and the CPU candidates, not only the goddesses themselves but also the inhabitants of Gamindustri ended up very bored. Due to that, the goddesses discussed an interesting proposal.
Plot
Set during peacetime after the events of the recurring 'Console War' of the previous games the CPUs of the world of Gamindustri seek to raise awareness from non-CPU supporters and new nations by improving their public profile. They are approached by a popular journalist named Dengekiko who offers to report on the CPUs during guild missions. Meanwhile, rival journalist Famitsu is assigned to report on the CPUs' sisters, the CPU candidates, though the two factions soon merge into a single group, and Dengekiko and Famitsu agree to cooperate and fight alongside the CPU team after being issued transforming combat armor by their employer, which grants them near-CPU level abilities. The party slay countless monsters, complete several guild missions and successfully boost their popularity but are soon defeated and publicly humiliated by a mysterious new adversary known as Next Gen Mech who makes a point of shaming the party onlive television by tearing off their clothes. After a brief recovery, the party analyse their battle strategy and discover that whilst they are an immensely powerful team, their attacks are not coordinated with each-other. After undergoing training exercises to integrate their attacks, and completing further guild missions to improve their public standing, the girls challenge Next Gen Mech again and emerge victorious after breaking through its defenses by working together. Inspired by the CPUs, Dengekiko and Famitsu agree to work together on a single article rather than publishing separate reports of the CPUs' adventures. Meanwhile, the CPUs' close friends IF and Compa arrange a friendly battle tournament for the CPUs, followed by an intense combat arena in Neptral Tower, with a rebuilt Next Gen Mech awaiting them on the top floor.
Characters
The four goddesses, Neptune, Noire, Blanc and Vert, and their sisters Nepgear, Uni, Ram and Rom all appear in the game. There are also two new playable characters that will be based on Japanese Gaming magazines, Dengekiko and Famitsu.
Reception
Hyperdimension Neptunia U: Action Unleashed received "mixed or average" reviews on both platforms according to the review aggregation website Metacritic. In Japan, Famitsu gave the Vita version a score of three sevens and one six for a total of 27 out of 40.
