Pchooooooo! achievement in Outer Wilds

New unnamed achievements were just added to Outer Wilds on steam. : r/ outerwilds

Outer Wilds Achievements @ Gamertag Nation

Outer Wilds Achievement Guide 100% PC Achievement Guide

Achievements+ - Displays stock, DLC, and custom mod achievements on a menu screen and shows a popup when you earn one. (by @xen-42)

Doubt, spoiler] Why I am not getting archeologist achievement? Explanation in comments : r/outerwilds

Steam Community :: Guide :: Ghosts in the Machine Achievement Guide - Echoes of the Eye

Outer Wilds: Echoes of the Eye DLC adds 14 secret achievements

1/900 ACHIEVEMENT UPDATE 1.1.13

Achievements - Official Outer Wilds Wiki

Outdated] Easy 1/900 Achievement Trophy Guide - Outer Wilds Echoes of the Eye