The Aperture Science Handheld Portal Device, commonly known as the Portal Gun, is a fictional device from the video game series Portal. It allows users to create two linked portals on flat surfaces, enabling instant travel between them. This innovative technology is central to the game's puzzles and challenges. The device is designed to facilitate exploration and problem-solving within the Aperture Science facility. Players use the Portal Gun to navigate complex environments, manipulate objects, and escape obstacles, showcasing its unique gameplay mechanics and the creative potential of portal-based movement.