Keio Flying Squadron (慶応遊撃隊, Keiō Yūgekitai) is a series of video games developed by Victor Entertainment and released for the Sega/Mega CD, Sega Saturn, and Sony PlayStation consoles. The series consists of three games and one bonus disc, with each game being of different genre. The first is a side-scrolling shoot ’em up, the second a platformer, and finally a party game.

Players take on the role of Rami Nana-Hikari, a 14-year-old girl who is the newly appointed Secret Keeper of Treasure, a sphere that unlocks a gold reserve set deep in a mountain. The games refer to Japanese culture, both ancient and modern simultaneously.