"Mega Man X" was a commercial success. The SNES version has sold 1.16 million copies worldwide to date, making it the 41st best-selling Capcom game of all time. IGN's Jeremy Dunham speculated that the game's more mature storyline and its inclusion of numerous gameplay extensions over the original "Mega Man" series helped create a "unique cadre of fans". The game was followed by seven direct sequels and three related titles: "Mega Man Xtreme", "Mega Man Xtreme 2", and "Mega Man X Command Mission". Another video game spin-off series, "Mega Man Zero", began in 2002 on the Game Boy Advance handheld as a result of the immense popularity of the character Zero.