During the 8-bit era, "Bokosuka Wars", a computer game developed by Koji Sumii for the Sharp X1 in 1983 and ported to the Nintendo Entertainment System (NES) by ASCII in 1985, was responsible for laying the foundations for the tactical RPG genre, or "simulation RPG" genre as it is known in Japan, with its blend of role-playing and strategy game elements. The game revolves around a king who must recruit soldiers and lead his army against overwhelming enemy forces, while each unit gains experience and levels up along the way. It is also considered to be an early prototype real-time strategy game.