After over 100hrs of gameplay, I've finally completed it 100%! : r/ outerwilds

Early Adopter achievement in Outer Wilds

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

Gone In 60 Seconds achievement in Outer Wilds

Foolproof Guide to Ghosts In The Machine - Outer Wilds Echoes of the Eye Achievements

EOTE *minor* spoiler] Artstation has some images from concept art for the DLC. There are 14 achievements in-game, but 15 on the art-station. Any guesses as to what this achievement would've been

Outer Wilds Achievement - Mica's Wrath

Outer Wilds - An Expedition of Repetition - The Something Awful Forums

Outer Wilds Achievements - View all 31 Achievements

Achievements - Official Outer Wilds Wiki

Outer Wilds - Ash and Ember - Fangamer