Katamari Damacy (Japanese: 塊魂 Katamari Damashī, "clump soul") is a third-person puzzle-action video game that is developed and published by Namco for the PlayStation 2 video game console. It was first released in Japan, and then later in South Korea and North America. The game resulted from a school project from the Namco Digital Hollywood Game Laboratory, and was developed for less than $1 million. In designing Katamari Damacy, the development team aimed to maintain four key points: novelty, ease of understanding, enjoyment, and humor.
The game's plot concerns a diminutive prince on a mission to rebuild the stars, constellations, and Moon, which were accidentally destroyed by his father, the King of All Cosmos. This is achieved by rolling a magical, highly adhesive ball called a katamari around various locations, collecting increasingly larger objects, ranging from thumbtacks to people to mountains, until the ball has grown great enough to become a star. Katamari Damacy's story, characters, and settings are bizarre and heavily stylized, rarely attempting any resemblance of realism, though the brands and items used are based on those current in Japan during the game's production.
Overall, Katamari Damacy was well received in Japan and North America. The game was dubbed a sleeper hit, and won several awards. Katamari Damacy inspired the development of other video games, and led to the release of seven sequels in Japan and other territories: We Love Katamari (PlayStation 2), Me & My Katamari (PlayStation Portable), Beautiful Katamari (Xbox 360), i Love Katamari (iOS), Katamari Forever (PlayStation 3), Katamari Amore (iOS), and Touch My Katamari (PlayStation Vita).