Here is the full list of all 15 Aim Master H achievements.
Get a High Score of 250 on Endless Mode 3.
Get a High Score of 100 on Endless Mode 3.
Get a High Score of 50 on Endless Mode 3.
Get a High Score of 250 on Endless Mode 2.
Get a High Score of 100 on Endless Mode 2.
Get a High Score of 50 on Endless Mode 2.
Get a High Score of 250 on Endless Mode 1.
Get a High Score of 100 on Endless Mode 1.
Get a High Score of 50 on Endless Mode 1.
Play an 'Endless' level for the first time.
Open the gallery for the first time.
Finish all normal levels.
Get 100% Accuracy on all normal levels.
Complete level 1.
Get 100% accuracy in a level.