I've noticed that after a recent update to my Xbox One, some achievements are considered "rare." A diamond will appear in the notification for the achievement when it is unlocked. Some of these achievements I've seen the diamond on are rather easy, and I don't get how they are considered "rare."

What determines or at what point is an achievement considered rare?

  • 1
    If it's like Playstation it would be determined by the % of people who got it. an easy to get story progression trophies in a PS3, PS4 or PSVita game can be "rare" if people dropped the game and didn't play it through (ie. some Sword Art Online Hollow Fragment Trophies for clearing floors/Hollow Area Bosses or Persona 4 Golden Trophies for saving main characters)
    – Memor-X
    Nov 21, 2016 at 1:05

1 Answer 1


In the patch notes video for this update it was stated that an achievement is Rare if less than 10% of all players (who have started that game) have gotten it. This means an achievement can be rare, and then as more people get it, it becomes a regular achievement.

I can't find an official MS post, but this post on trueachievements.com confirms that 10% calculation.

  • 1
    So in essence, it is rare simply because people didn't get it, and as more people chase these rare achievements, it gets... less rare. This is actually really funny. Probably drives OCD people insane.
    – Nelson
    Nov 21, 2016 at 4:45
  • So, basically does it mean that after some time there will be no rare achievements?
    – Exerion
    Nov 21, 2016 at 7:20
  • 3
    No, because there will always be achievements that not all players can get, and people will just simply stop playing the game.
    – Nelson
    Nov 21, 2016 at 7:30

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