Here is the full list of all 16 Dawn of a Soul achievements.
Collect all soulshards.
Collect all soulshards in big triangle collection.
Solve each puzzle in big triangle collection.
Collect all soulshards in big diamond collection.
Collect all soulshards in Half opened Eye collection.
Solve each puzzle in Half opened Eye collection.
Solve each puzzle in big diamond collection.
Collect all soulshards in big circle collection.
Collect all soulshards in small triangle collection.
Solve each puzzle in big circle collection.
Collect all soulshards in small diamond collection.
Complete tutorial puzzles.
Collect all soulshards in tutorial puzzles.
Think first then act.
Time is precious.
Play carefully and without help.