an Entity references as follows:
Raiden is a series of arcade games by Seibu Kaihatsu initially available in arcades in Japan and later distributed to other countries by Fabtek and other arcade game manufacturers. The game that began the franchise was Raiden. It was ported for the PlayStation as The Raiden Project. In the 1990s, it was ported to various home computers and game consoles of the time. Later ports were released on mobile phones.