Raiden is the greatest series of arcade vertical scrolling shoot-em-ups ever created. The series consists of Raiden, Raiden 2, Raiden DX, Raiden Fighters, Raiden Fighters 2, Raiden Fighters JET. They are made by a small japanese company known as Seibu-Kaihatsu. Some of the games have been converted to home consoles such as the playstation and tg16. The Raiden Fighters games remain arcade only. These games are known to eat rediculous amounts of quarters.