From Polygon: “In the late 80s and early 90s, Capcom released games that achieved respectable sales. Mega Man and Street Fighter did not light sales charts on fire in 1987, particularly compared to the success stories of other companies like Nintendo and Sega, but they performed well enough for Capcom to release sequels that put these franchises on the map. Mega Man 2, believed by many to be the best in the series, outsold the original and became a global million-seller. The success of Street Fighter 2 was even more remarkable: it blew the first game so far away that the original is barely a footnote in Capcom history.”
Source: N4G PC How Resident Evil 2 fell apart, then became one of Capcoms biggest hits