Streets of Rage 1, 2, 3 all official roms in one place

Streets of Rage (also called Bare Knuckle, ベア・ナックル) is a tailor-made beat 'em up style series video game in the 90s of last century, made by SEGA company for its 16-bit home game console - Mega Drive to go after the side-scrolling game agitation in arcade industry. There are a total of 3 official works. Below, I only give a brief introduction to these 3 official generations.