Level-5's soccer RPG Inazuma Eleven does pretty well for itself, but SEGA isnt having any of it. Now, the major Japanese publisher is suing Level-5, claiming that the Inazuma series violates two of SEGA's patents.
SEGA is seeking $11 million from Level-5, as well as ceasing sales of eight Inazuma Eleven games. The company believes that the way the characters are controlled through the DS touchscreen violate their patents. Details regarding the patent and exactly how the games' controls infringe upon it weren't divulged.
Since the eight Inazuma titles have sold over three million units, SEGA also states that Level-5 owes more than 900 million yen in royalties (that's roughly $11 million USD). Not the biggest number we see tossed around in corporate lawsuits, but it's certainly nothing to sneeze at.