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