How can I find out the rarest Steam achievement?
Having completed the most difficult achievements for a couple of games, I started wondering how difficult the worst achievements can be. One well-defined measure for difficulty of an achievement is its rareness. Sadly, I don't know how to find global achievement stats for all Steam games.
What I want to know is:
What is the most rare single player achievement on Steam, in terms of
- individual players?
- percentage of players?
As any answer would eventually become outdated, I'm not asking that question per se. Instead, I would like to know how the rarest achievements can be found.
A good answer, then, depicts a method for finding the rarest achievements on Steam.
Best Answer
For the rarity of any Steam Achievement I recommend to use this toplist on AStats:
http://astats.astats.nl/astats/TopListAchievements.php?DisplayType=1
This community of Achievement Hunters is strictly moderated and reflects a good portion of Steam's user base. Cheaters are banned regularly and on sight.
Pictures about "How can I find out the rarest Steam achievement?"



What is the rarest achievement?
The 7 Rarest Achievements And Trophies According To The Guinness Book Of World Records Gamer's Edition 2020.- Lambda Locator (Half-Life 2) ...
- Giant Crown Master (Monster Hunter World) ...
- Evil Nightmare (Doom 3 BFG Edition) ...
- Firefly (The Last of Us Remastered) ...
- Minigame Master (Yakuza 3)
What is the hardest achievement to get on Steam?
For this list, we'll be looking at achievements on the Steam platform that are notoriously difficult to obtain, or are cryptic in nature.- #8: Unachievable. ...
- #7: Impossible Boy. ...
- #6: Tau Efficiency. ...
- #5: 7 Day Survivor. ...
- #4: Little Rocket Man. ...
- #3: The Three Mountains. ...
- #2: Yes, I Am The Real Garry! ...
- #1: 90 Day Streak.
Top 10 Most Insane Steam Achievements
More answers regarding how can I find out the rarest Steam achievement?
Answer 2
You can find out your own rarest achievements, but this method does require that you are at least Steam Level 10 (since that is when you unlock the ability to add 'showcases' to your profile - but correct me if I'm wrong). Go to your profile, click the edit button, scroll down to the bottom of the page, then change the dropdown menu for 'Featured Showcase' to 'Rarest Achievement Showcase'. This will show you the six rarest achievements that you own, and if you hover over them it will tell you the percentage of players who have it.
Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.
Images: Ann H, Plato Terentev, Nothing Ahead, Gabriela Palai
