Gamera vs. Gyaos (大怪獣空中戦 ガメラ対ギャオス, Daikaijū kūchūsen: Gamera tai Gyaosu, Giant Monster Midair Battle: Gamera Versus Gyaos, released in the U.S. as Return of the Giant Monsters) is a 1967 Kaiju film directed by Noriaki Yuasa and written by Nisan Takahashi.