Here is the full list of all 31 Fit Puzzle Blocks achievements.
Complete puzzle 20
Complete puzzle 10
Complete puzzle 1
Complete puzzle 30
Complete puzzle 40
Complete puzzle 50
Complete puzzle 60
Complete puzzle 70
Complete puzzle 80
Complete puzzle 90
Complete puzzle 100
Complete puzzle 110
Complete puzzle 120
Complete puzzle 130
Complete puzzle 140
Complete puzzle 150
Complete puzzle 160
Complete puzzle 170
Complete puzzle 180
Complete puzzle 190
Complete puzzle 200
Complete puzzle 210
Complete puzzle 220
Complete puzzle 230
Complete puzzle 240
Complete puzzle 250
Complete puzzle 260
Complete puzzle 270
Complete puzzle 280
Complete puzzle 290
Complete puzzle 300