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