Cyber Stadium Series: Base Wars was developed by Konami as a futuristic baseball game for the Nintendo Entertainment System. It was released in 1991, and was intended to bring a new dynamic to the baseball genre in gaming.

Baseball team owners have become frustrated with the continually increasing sallaries of baseball players, and have decided to use cyborg robots instead. There are 14 teams in the league, 12 of which represent specific cities. Robots often pitch battles between each-other during the game, in order to achieve victory, beyond the basic rules of baseball.