Gamera vs. Gyaos
 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. It is the first Gamera film to feature the Kaiju character Gyaos who would later become Gamera's most popular rival to date as the character would later be used for Gamera: Guardian of the Universe and Gamera the Brave.Gamera vs.