Here is the full list of all 18 Refraction achievements.
Devote Yourself to Paul
Help Paul With His Carving
Reach Jun's Good Ending
So long, and thanks for all the Ether.
Impress Jun With Your Opinions
Devote Yourself to Jun
Reach Paul's Good Ending
Reach the Normal Ending
Get to Know Evana a Little Better
Reach the Bad Ending
Complete Day 7
Complete Day 6
Complete Day 5
Complete Day 4
Complete Day 3
Complete Day 2
Complete Day 1
Start the Real Game