Here is the full list of all 36 UPPERS achievements.
Clear End Chapter.
Clear Act 6.
Unlock all playable characters.
Clear Act 3 Side Story.
Get 30 Love Letters.
Clear Act 5.
Reach maximum (LV5) Voltage.
Clear Act 4.
Watch every reward cutscene for 1 Queen.
Clear Act 3.
Clear Act 2.
Lift Shopping District's Queen skirt.
Activate map gimmicks/special actions 100 times.
Clear Act 1.
Defeat Chapter 1 boss with a finisher.
Defeat a boss with an Upper Rush.
Defeat a boss with a Friendship Upper Rush.
Get a match in Panty Slots.
Change clothes in the ONEPOINT shop for the first time.
Perform a Friendship Upper Rush.
Successfully perform an Upper Rush.
Perform a Rise Up.
Get 1 Love Letter.
Activate Panty Slots.
Defeat 1 grunt.
Get 50 Love Letters.
Defeat all bosses on the streets.
Use all map gimmicks.
Watch every reward cutscene for 4 Queens.
Get "Ino-Shika-Cho" in Panty Slots.
Get "World Expo" in Panty Slots.
Watch every reward cutscene for all Queens.
Get 100 Love Letters.
Clear all Panty Slot combinations.
Clear the last Chapter without taking any damage.
Obtain all available trophies.