English Title: Katamari Damashii
Japanese Title: 塊魂
Publisher: Namco
Developer: Namco / Now Production
Genre: Rolling Action
Released: Mar. 18, 2004
Product Codes: SLPS-25360 / JAN 4907892015555

Na naaaaaa na na na na naaa naaa naaa na katamari damashiiiiii~

The first title in Namco's strangely appealing rolling-stuff-up series, and the only one that doesn't get bogged down with any extraneous crap or self-referential fan-service. While the second game is definitely great in its own right (and many fans consider it the series' peak), and the later entries are certainly serviceable (and more technically-sound), for my money, the very first game is the most pure and straight-up enjoyable in the entire franchise.