Here is the full list of all 14 Anodyne 2: Return to Dust achievements. It takes around 10-12 hours to unlock all of the achievements on Windows.
Find 500 Metacoins!
Find 400 Metacoins!
Successfully Confront the Center.
Finish the preparations for the Anodyne.
Find 200 Metacoins!
Clear the storm and visit the Outer Sands.
Visit an Unzone.
Learn from a Metainfo point.
Purchase something from the Metashop.
Get a Metacoin!
Reach the bottom of the Spire.
Visit the Blue Vale
Exit the Albumenium
Enter Nanoscale for the first time