Ultra Software Corporation (a.k.a. Ultra Games) was a spinoff company created in 1988 as a subsidiary of Konami of America, in an effort to get around Nintendo of America's strict licensing rules. One of these rules was that a third-party company could only publish up to five games per year for the Nintendo Entertainment System in North America. This was hardly convenient for Konami, which had begun releasing more than ten games a year for both the Famicom and Famicom Disk System in Japan. With a greater library than they were allowed to localize, Konami formed the Ultra Games brand to extend their annual library to ten games a year.