Hyperdimension Neptunia is a role-playing game set in a world where the last humans are living on Earth while the rest of the planet is colonized by aliens. The story follows a group of characters, including Pollune, a robot girl who joins forces with human resistance fighters to defeat an alien threat.
The gameplay involves exploring dungeons, battling enemies, and making choices that impact the story. Players can also build relationships between characters and engage in combat using a variety of abilities and attacks. The game features turn-based battles and a unique character development system.