Cyberdimension Neptunia: 4 Goddesses Online is a Japanese role-playing video game developed by Compile Heart and Tamsoft and published by Idea Factory International. Despite the title, the game is a single-player game with an online cooperative multiplayer option.
It is a super-popular title that utilizes Gamindustri's Goddesses as official models.
The stage of the story is set within a fantasy world,
surrounded by verdant and gorgeous ocean, known as Alsgard.
Logging into the game world,
the four CPUs meet with the Guardian Spirit, the guide to all adventurers, Bouquet.
They discover that they are the Chosen Ones tasked with the mission of reviving the Goddesses of legend,
and that Alsgard is under the looming threat of the villainous Demon King.