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