Rarest Borderlands 2 achievement

Ironically, given its name, fewer gamers have earned Borderland 2's “Challenge Accepted” achievement than any other in the game. It requires players to complete level 1 of all non-level-specific challenges with a single character. As of 17 March 2015, an average of 6.1% of gamers have risen to the challenge. The 6.1% is an average based on: 1.50% of players (PlayStation 3 and PS Vita) 0.8% of players (Steam/PC) 16% of players (Xbox 360) The stat for Xbox 360 is taken from TrueAchievements, so it only takes into account members of that site. However, it is a leading site and there is no official way to track the rarity of Xbox 360 and Xbox One achievements. *This record is for the original game, and does not include DLC.