Here is the full list of all 39 Gal*Gun: Double Peace trophies - there are 18 bronze, 17 silver, 3 gold and 1 platinum.
Unlock All Trophies
Complete Profiles for Every Girl
Obtain All Images in the Gallery
Defeat 100 Demon Girls
View All of the True Endings
View the True Love Route's True Ending
Achieve Godlike Rank
Receive a "Perfect!" Score VS Patako
View Patako's True Ending
View Kurona's True Ending
Receive a "Perfect!" Score VS Kurona
Receive a "Perfect!" Score VS Shinobu & Maya
Receive a "Perfect!" Score VS Maya
Get a Perfect Score on "Maya's Medical Care"
Receive a "Perfect!" Score VS Shinobu
View Ekoro's True Ending
Receive a "Perfect!" Score VS Ekoro
Collect All of the Panties From the Changing Room
View Sisters Route's True Ending
Get a Perfect Score on "Demon-Attracting Balm"
Get a Perfect Score on "Sisters' Odd Ritual"
View Aoi's Ending
View Maya's True Ending
Receive a "Perfect!" Score VS Mr. Demon Balloon
Get a Perfect Score on "Maya's Demon Calling"
Make 50+ Girls Experience "Double Peace"
View Your First Ending
View Shinobu's True Ending
Experience Your First Final Doki-Doki Mode
Receive a "Perfect!" Score VS Mr. Demon Veggie
Give 500 Girls Euphoria
Fulfill 10 of the Girls' Requests
Fire 1000 Pheromone Shots
Get a Perfect Score on "Her Majesty Shinobu"
Get a Perfect Score on "Shinobu in the Window"
Get a 30 Combo of Ecstasy Shots
Get 100 Ecstasy Shots
Experience Your First Doki-Doki Mode
Give a Girl Euphoria