One is missable, but it's not required for the achievement. Only two logs from the starting village are required. The only way to lose progress is to choose to start a new game, or to never enter the loop to begin with. There is no point of no return from which you'll lock yourself out of the achievement.

If the issue still remains for you, contact the devs as previously mentioned. IMKevin117 reports that this should be fixed now, once and for all. If you believe that you're affected by a bug, contact the devs at. There has been issues with unlocking logs related to the character Gabbro. There seems to be a lot of confusion about this achievement, so just to clear up a few things: Nobody is going to naturally speak to this guy all of these times, (why would you suspect that this one character has more to say, but only says it at a specific time - lame, I prefer to do everything myself without going to the internet and I had done everything but speak to this guy multiple times). And 1 or 2 entries for speaking to him just before the sun goes supernova in the last few minutes. 1 or 2 entries for speaking to him after the 16 minute mark. I think you get 2 entries for speaking to him before the 16 minute mark. You could also add that the Chert section is likely the one that people will miss, because you have to speak to him multiple times and at different stages of the loop. There are even comments in this thread which say this - and it's not true.

I was stressing about this for a while because I searched the internet to try and figure this achievement out and kept finding comments from random people saying this. I got the achievement last night, and I can confirm that you don't need that entry. This will leave you with only 2 entries in the Village section.' You can still get the achievement even if you don't speak with Hal in the Village at the beginning of the game. Ruptured Core - 4EDIT: Per a comment by Hercules SR117

Outer wilds achievement guide