Complete all trophies

Play twinkle twinkle little star in the piano

Play all the music notes

Break all the pots

Complete Chapter 4

Input 1915 on the safe

Finish the Tea Time with Eda and Owl

Click bird inside the postbox

Tidy up Eda's room

Break all of the tombstones

Collect 541 Items from corpses

Gain the Allied Trust status with three different Encampments

You've discovered 60% of the Explorer Notes on the ARK!