Here is the full list of all 37 Gal*Gun 2 (EU) trophies - there are 18 bronze, 14 silver, 4 gold and 1 platinum.
Unlock every trophy.
Take a good look from below when you have a girl over.
Get stepped on by 50 girls.
Get stepped on by 10 girls.
Get kissed by 50 girls.
Call a girl over to your house for the first time.
Get kissed by 10 girls.
Reach the Harem ending.
Get every girls' phone number.
Finish Chiru's route B.
Reach Risu's good ending.
Upgrade your Pheromone Goggles to their final form.
Have plenty of conversations with Chiru.
Finish Nanako's route B.
Finish Chiru's route A.
Upgrade your Demon Sweeper to its final form.
Clear all of the Kamizono Sisters' requests.
Give 30 girls Striphoria.
Clear your first search mission.
Reach the ending for the first time.
Finish Nanako's route A.
Use the Demon Sweeper to give a girl Striphoria for the first time.
Clear your first Doki Dokie Mode.
Give 500 girls euphoria.
Give 50 girls euphoria with Lovestrikes.
Have plenty of conversations with Nanako.
Suck up a Metal Kurona for the first time.
Suck up 500 mini-demons.
Clear your first defense mission.
Suck up 100 mini-demons.
Give a girl a snack for the first time.
Give 100 girls euphoria.
Get 50 ecstacy shots in a row.
Get 30 ecstacy shots in a row.
Clear your first regular mission.
Perform a Lovestrike for the first time.
Get an ecstacy shot for the first time.