Here is the full list of all 10 Memorion achievements.
Finished 10 levels
Finished 20 levels
Finished 30 levels
Finished 40 levels
Finished all 50 levels
Finished 10 levels with the optimal number of interactions
Finished 20 levels with the optimal number of interactions
Finished 30 levels with the optimal number of interactions
Finished 40 levels with the optimal number of interactions
Finished all levels with the optimal number of interactions