 The Raiden characters name was originally spelt with an "I" in both  Mortal Kombat 1 and 2 (as seen in the arcade versions). When Mortal  Kombat was released to home systems such as Super Nintendo and Sega  Mega Drive, Raidens spelling changed to Rayden with a "Y". This was  to avoid legal troubles with the already realeased aircraft shooting  video game called "Raiden". Since then, Raidens name was changed to  Rayden.