Konami’s output on the Famicom was simply amazing. While we certainly got some good games on this side of the pond, such as Castlevania and Contra, there were a plethora of great titles that stayed in their homeland.
They were once a playful company with a cohesive catalog. Many games in their early days made reference to their other releases, and they even pioneered the idea of crossover titles with Konami Wai Wai World. I really, badly miss those days that I was too young and also in the wrong country to really experience. Creativity was rampant among those titles, and it wound up giving us some really memorable concepts.
Source: Destructoid Trim your waistline in Konami’s Yume Penguin Monogatari