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.
Reach the Harem ending.
Get every girls' phone number.
Finish Chiru's route B.
Finish Chiru's route A.
Finish Nanako's route B.
Clear all of the Kamizono Sisters' requests.
Upgrade your Demon Sweeper to its final form.
Finish Nanako's route A.
Upgrade your Pheromone Goggles to their final form.
Take a good look from below when you have a girl over.
Call a girl over to your house for the first time.
Get stepped on by 50 girls.
Get stepped on by 10 girls.
Get kissed by 50 girls.
Get kissed by 10 girls.
Have plenty of conversations with Chiru.
Have plenty of conversations with Nanako.
Give 50 girls euphoria with Lovestrikes.
Suck up 500 mini-demons.
Give 30 girls Striphoria.
Give a girl a snack for the first time.
Reach the ending for the first time.
Reach Risu's good ending.
Clear your first Doki Dokie Mode.
Give 500 girls euphoria.
Suck up a Metal Kurona for the first time.
Use the Demon Sweeper to give a girl Striphoria for the first time.
Suck up 100 mini-demons.
Clear your first defense mission.
Clear your first search mission.
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.