The Warriors Street Brawl

In order to unlock this achievement you simply need to complete the games story mode. Not much to say in the way of a specific way to obtain this achievement, as it is pretty straight forward and easy. The game has 7 missions with 3 stages each, so in all, 21 stages. It will take you around 3 hours on the easiest difficulty setting. You can do it in local co-op and both players will earn the achievement.

I hope this solution helped! Leave a comment letting me know if there is any room for improvement! Thanks.