If you're looking up this guide, you're probably wondering what you missed in-game and why you can't find the clues for this password.

You didn't miss anything in-game, because Byotr's Rock is a left-over bit of an ARG the devs put into the game. The solutions are not in the game, so using this guide will not result in any spoilers!

In the Cult Islands territory, in the Breeding Isles region, there's an island called Byotr's Rock with an event exclamation point in front of it. Interacting with this will ask you for a password to bypass the "First Barrier".

First Barrier Password: GRABROCK

Second Barrier Password: CAPTAINSMITH

Entering both of these will give you a sequence in Morse Code and a clue about "looking outside yourself." This points you to solving the puzzle in real life for the ARG and has no further game-play effect. Congratulations, you just got the "Grr, Arg" achievement!

I just started playing this game a week ago, there's no way I had any idea there was an ARG and I absolutely didn't solve this. I found the answer in a thread in the forums:

Originally posted by BeardedS0ul:

The ARG has now been completed and congratulations to Bytor_x86 on the win and thanks for the race m8!

As an early Christmas gift for all of you achievement hunters out there, here is the two barrier passwords you need to get the achievement:

The first barrier: Grab Rock.
The second barrier: Captain Smith.

If you want to know more about the ARG:

Cracking the Secret Code

https://gtm.steamproxy.vip/app/551860/discussions/0/3338785229794656900/?ctp=4

Someone Probably: "Wow, great work DX42, you've stolen someone's forum post and claimed you wrote a guide."
Me: "... you're not wrong... but did you want to go searching through forum posts to find these clues? I didn't want to do that, and now no one else has to either."