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