My rarest achievement is from The Long Dark (Finely Tuned) at 0.1%. But that’s because not many people played the last episode when it came out.

My most memorable is from Titanfall 2 (…Becomes the Master) Place in the top 3 of the Gauntlet scoreboard. That one is at 2.9%

Apparently, completely finishing any Lego game (I have, at this point, completed 6 of them).

Definitely not as rare as most of y’all and probably only as rare as it is because of how many millions of people play stardew valley without ever even trying the arcade machines.

0.4% Pillars of Eternity 1: No Rest for the Pro. Complete the game with fewer than 10 rests.

My top 20 rarest achievements according to steamvault were all dirt rally ones about beating easy stage times…

Not many people played dirt too seriously it seems 😄

This is my rarest but it’s a small part that nobody plays of a niche game.

0.2% - American Truck Simulator

Shining Star
Obtain 3 stars in any 3 scenarios played in a row in Truck Driving Proficiency (Driving Academy)

The one I’m proud of:

0.3% - Halo: Master Chief Collection

A Preference for Pain
Halo 3: Complete the Halo 3 LASO Campaign playlist.

Is there an easy way to find out without using third party websites?

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All my latest most rare achievements are all from Megabonk, which IMO don’t really count. They are easy to get if you just play long enough.

My rarest for a very long time was this one with something like 0.3%, but it has apparently since gone way up. It used to have one of those gold borders around it indicating it was very rare. I got this on my second round that I played and then quit pretty much right after that. Not a very good game, unfortunately.

The one I am most proud of is this one:

I got bored after I took over Britannia as the Britons and had no more enemies who could realistically challenge me, so I sailed directly down to Rome with my army of slingers and tribesmen and sacked Rome for something like 100k denarii.

Napoleon Total War. Not sure if I was achievement hunting or not but it sounds fun.

Heart of the machine, 0.4%

Ah I see witch it.

Even silksong came out I got the achievement for fourth chorus when it had a 1% completion rate

How do you check again how many copies a game sold?

Because I have some 1% achievements in games that sold millions, but I’d argue my “20% of players” achievement in a 200 reviews game is rarer.

It’s not so rare now; but on the second day Silksong was out, I got the achievement for defeating Phantom when it was still 0.1%