PolyAssets United Inc. is a design and digital production company based in Tokyo, Japan. They have worked with many companies involved in the video games, industrial design and amusement companies in Japan, the United States, Canada and Europe. They have worked with Nintendo a handful of times, including on Metroid Prime Hunters. The company is credited under special thanks in that game; the PolyAssets website goes into more detail. They were responsible for the opening animation, environment modeling and visual effects of Hunters. PolyAssets' other video game credits include Paper Mario: Color Splash, Undead Knights, Spectrobes: Origins, Enchanted Arms and Altered Beast.