Here is the full list of all 24 Strata achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Complete a 6x6 puzzle
Perfect a 6x6 puzzle
Complete the Prodigy Set
Perfect the entire Prodigy Set
Complete 200 Perfect Puzzles
Complete the Sundry Set
Perfect the entire Sundry Set
Complete a 5x5 puzzle
Perfect a 5x5 puzzle
Complete 100 Perfect Puzzles
Complete the Persist Set
Perfect the entire Persist Set
Complete 50 Perfect Puzzles
Complete a 4x4 puzzle
Perfect a 4x4 puzzle
Perfect the entire Flourish Set
Complete the Flourish Set
Complete the Entwine Set
Perfect the entire Entwine Set
Complete 10 Perfect Puzzles
Complete a 3x3 puzzle
Perfect a 3x3 puzzle
Complete your first Perfect Puzzles
Complete the Tutorial