Kaseki Horider - Mugen Gear (Japanese: カセキホリダームゲンギア) is a 3DS action-adventure game developed by Nintendo and released in Japan in October 2012. The game is set in a world of mechanical creatures called Kaseki, and players take on the role of a young boy named Ryo as he sets out on a quest to find the legendary Mugen Gear. Along the way, he must battle powerful Kaseki, solve puzzles, and explore a variety of environments. The game features an intuitive control system that makes it easy for players to explore the world and battle enemies. Players can use the 3DS's touchscreen to move around the world and interact with objects, while the Circle Pad and D-Pad are used for movement and combat. In addition to the main story mode, the game also features a Challenge Mode that allows players to test their skills by completing various tasks and puzzles. Kaseki Horider - Mugen Gear is a visually stunning game that features detailed 3D graphics and a vibrant color palette. The game also features an original soundtrack composed by Yuzo Koshiro, which helps to create an immersive atmosphere. With its unique blend of action, adventure, and puzzle-solving, Kaseki Horider - Mugen Gear is sure to provide hours of entertainment for 3DS owners.