A cave or cavern is a hollow place in the ground, especially a natural underground space large enough for a human to enter. Caves form naturally by the weathering of rock and often extend deep underground. The word cave can also refer to much smaller openings such as sea caves, rock shelters, and grottos.

CAVE Interactive CO.,LTD., more commonly known as just CAVE (Computer Art Visual Entertainment), is a Japanese video game company, known primarily for its manic shoot 'em ups. CAVE remains one of the most active makers of arcade shoot-'em-ups in the Japanese market. The company was formed primarily from the remains of Toaplan, and several of their early games are considered to be spiritual successors to prior Toaplan works, in particular Truxton and Batsugun. CAVE in the past, produced titles for arcades, Xbox 360 and PS3, as well as online games for the PC. CAVE currently produces titles for smart phones.