"Mega Man, known as Rockman in Japan, is a video game franchise from Capcom, usually starring a character named Mega Man. The series is well-known and comprises well over 50 releases, making it easily Capcom's most prolific franchise. As of December 30, 2008, the series has sold approximately 28 million copies worldwide. The Mega Man games began in 1987 with the first Mega Man game for the Nintendo Entertainment System. It, and its sequels, comprise the original series, which has since been followed by several spin-off series in the same fictional universe."
Source: Wikipedia, "Mega_man", available under the CC-BY-SA License.