"Mega Man 5, known as Rockman 5 Blues no Wana?! (ロックマン5 ブルースの罠?!, lit. "Rockman 5 Blues' Trap?!") in Japan, is a video game developed by Capcom for the Nintendo Entertainment System (NES). It is the fifth game in the original Mega Man series and was originally released in Japan on December 4, 1992. It saw a release during the same month in North America and on November 18, 1993 in Europe. The plot takes place after the fourth defeat of the evil Dr. Wily at the hands of the heroic robot Mega Man in the year 20XX. Proto Man uncharacteristically leads a group of menacing robots in attacks on the world and kidnaps his own creator Dr. Light, leaving Mega Man little choice but to take up arms in a fight against his once trusted brother.
Mega Man 5 carries over the same graphical style and action-platforming gameplay as the four preceeding chapters in the series. The game introduces a new character, Beat, which the player can use as a weapon once a series of eight collectable letters are found. Mega Man 5 was met with an average to fairly positive critical reception, with the one major complaint being its lack of originality in either its plot or gameplay."
Source: Wikipedia, "Mega_Man_5," available under the CC-BY-SA License.