Here is the full list of all 15 Dickland: Mini Games achievements.
Complete game "15" with picture number "1"
Complete game "15" with picture number "2"
Complete game "15" with picture number "3"
Score 64 points in the mini-game "2048"
Score 128 points in the mini-game "2048"
Score 256 points in the mini-game "2048"
Score 512 points in the mini-game "2048"
Score 1024 points in the mini-game "2048"
Score 2048 points in the mini-game "2048"
Complete the game "Find a Pair"
Collect in the game "PUZZLES" the picture under the number "1"
Collect in the game "PUZZLES" the picture under the number "2"
Collect in the game "PUZZLES" the picture under the number "3"
Score 15 points in the "SNAKE" mini-game
Score 30 points in the "SNAKE" mini-game