Here is the full list of all 22 Pixel Puzzle Makeout League achievements.
Escaped the Villain's clutches
Let the timer run out
Got to know a member of the Puzzle League
Went on a sneaking mission with Chess
Learned about Crossword's past
Climbed a mountain with Piecea
Tried something new with Sudoku
Survived an encounter with the Villain
Explored the digital realm
Made a costly mistake
Became partners with Chess
Found the truth with Crossword
Became whole with Piecea
Saved Sudoku
Found true love
Couldn't resist
Remembered what part she is
Remade the world / Set off on your own
Unlocked all special themes
Solved 100 pixel puzzles
Solved 200 pixel puzzles
Completed the Puzzle Maze