Progear is a 2001 horizontally scrolling bullet hell arcade video game developed by CAVE and published by Capcom for the CP System II board. Set in the fictional kingdom of Parts, players assume the role of children controlling a plane equipped with the titular propelling engine to overthrow the Metoruin sages and their new world order. It was the sixth shoot 'em up game from CAVE, their first horizontally oriented shooter, and their eighth video game overall.