The home console versions of "Zero Wing" were never released in North America due to the release of the arcade version distributed by Williams Electronics, and the European Mega Drive version of the game will not play on American consoles due region protection.
The home console versions of "Zero Wing" were never released in North America due to the release of the arcade version distributed by Williams Electronics. However, the European Mega Drive version of the game will play on American consoles due to a lack of region protection.