Here is the full list of all 38 Raining Blobs achievements.
Solve 20 puzzles
Create 5 combo
Clear 40 blobs at once
Clear 50 blobs at once
Clear 60 blobs at once
Create 7 combo
Score 1000000 points
Score 2000000 points
Clear group with 5 stars
Finish arcade normal
Finish arcade normal without gems
Finish arcade hard
Finish arcade hard without gems
Beat team of 2 hard cpu players with a friend
Beat team of 2 insane cpu players with a friend
Finish tournament without continues under 8 min
Finish tournament without continues
Finish tournament
Score 3000000 points
Endless battle 10 wins
Endless battle 30 wins
Endless battle 50 wins
Endless battle 10 wins with friend
Endless battle 30 wins with friend
Endless battle 50 wins with friend
Score 3000000 in endless battle
Score 5000000 in endless battle
Endless battle 30 wins, 4 players
Endless battle 30 wins, 8 players
Solve 40 puzzles
Solve 60 puzzles
Solve 80 puzzles
Solve all puzzles
Solve all puzzles under 12 minutes
Finish tournament with match 4 rules
Finish tournament with 1 star rules
Finish tournament on easy
Finish tournament on hard