Here is the full list of all 54 Hatsune Miku: Project DIVA Mega Mix+ achievements.
Cleared the tutorial.
Cleared a song in Rhythm Game for the first time.
Cleared 50 songs in Rhythm Game.
Cleared 100 songs in Rhythm Game.
Cleared 150 songs in Rhythm Game.
Cleared a song in Rhythm Game on EXTREME or EX EXTREME difficulty for the first time.
Cleared 10 songs in Rhythm Game on EXTREME or EX EXTREME difficulty.
Cleared 50 songs in Rhythm Game on EXTREME or EX EXTREME difficulty.
Cleared 100 songs in Rhythm Game on EXTREME or EX EXTREME difficulty.
Achieved a PERFECT in Rhythm Game for the first time.
Achieved a PERFECT on 10 songs in Rhythm Game.
Achieved a PERFECT on 50 songs in Rhythm Game.
Achieved a PERFECT on 100 songs in Rhythm Game.
Achieved a 39-combo in Rhythm Game.
Achieved a 100-combo in Rhythm Game.
Achieved a 200-combo in Rhythm Game.
Spent over 39 minutes and 39 seconds playing Rhythm Game.
Spent over 3 hours 9 minutes and 39 seconds playing Rhythm Game.
Spent over 39 hours 39 minutes and 39 seconds playing Rhythm Game.
Obtained 300 modules.
Obtained 400 modules.
Obtained 500 modules.
Obtained 600 modules.
Obtained 50 modules for Miku.
Obtained 70 modules for Miku.
Obtained 50 modules for Rin.
Obtained 70 modules for Rin.
Obtained 50 modules for Len.
Obtained 70 modules for Len.
Obtained 50 modules for Luka.
Obtained 70 modules for Luka.
Obtained 50 modules for KAITO.
Obtained 70 modules for KAITO.
Obtained 50 modules for MEIKO.
Obtained 70 modules for MEIKO.
Set a recommended module on any character for the first time (Song Specific only).
Set 10 types of recommended modules on any character (Song Specific only).
Set 39 types of recommended modules on any character (Song Specific only).
Obtained 10 accessories.
Obtained 50 accessories.
Obtained 100 accessories.
Obtained 150 accessories.
Used the T-Shirt Editor for the first time.
Set an edited T-Shirt on any character (Song Specific only).
Set an edited T-Shirt on six characters in a song (Song Specific only).
Achieved player rank 2.
Achieved player rank 10.
Achieved player rank 20.
Achieved player rank 39.
Watched 3 minutes and 9 seconds of music videos.
Watched 39 minutes and 39 seconds of music videos.
Watched 3 hours 9 minutes and 39 seconds of music videos.
Watched all movies in Attract Mode Theater.
Earned a total of over 39,000 VP.