Ultra Games was a subsidiary publishing label of Konami. It was a shell company created to get around the strict Nintendo America licencing laws that limited third party publishers to a maximum of five NES titles per year. Konami established Ultra Games to expand its capacity to support the publication of ten games a year. After 1992 Konami no longer needed to maintain Ultra Games as with the launch of the SNES in 1991 Nintendo America relaxed it strict restrictions on the number of games a third party could publish for their platforms each years.
The European equivalent of Ultra Software Company was Palcom Software which published many of the same titles for the European market.
Beam Software produced two titles for Ultra Software
Defender of the Crown (1989) NES (this was a port of the Amiga game and is lamented for the inevitable loss of audio and graphics quality from the original in port to the NES inferior capacity.)
Nightshade (1992) NES