Here is the full list of all 13 Of Frost and Flowers achievements.
Get Lithiel’s ending, and possibly get ownership to his entire forest…?
Met Terevska and Frosty.
Get Kisha's bad ending.
Be a victim of Lithiel's mischief.
Get Kisha's good ending.
Ate Lithiel’s signature silverbloom soup.
Have Kisha rescue you from execution.
Get Sol's good ending.
Get Sol’s bad ending.
Read all books in Al’ Sharan’s library at one sitting.
Met the definitely not suspicious Isaiah.
Bargained with Keshir and bought Sol a gift.
Have Sol rescue you from execution.