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