Complex sentence: Comprising three separate games, the Keio Flying Squadron (known as "Keio Yuugekitai" in Japan) is a series of games, which was released for the Sega Mega-CD, Sega Saturn, and PlayStation consoles in chronological order respectively.
Split into simpler sentences: Comprising three separate games, the Keio Flying Squadron (known as "Keio Yuugekitai" in Japan) is a series of games. It was released for the Sega Mega-CD, Sega Saturn, and PlayStation consoles in chronological order respectively.