Here is the full list of all 46 Hyperdimension Neptunia trophies - there are 34 bronze, 8 silver, 3 gold and 1 platinum.
You've been diagnosed with Neptunia.
Switched with back-row members in battle 50 times.
Obtained all content.
Obtained S rank in all Time Challenges.
Been everywhere in Gamindustri.
Defeated Arfoire with the power of all CPUs combined.
CPU Black Heart joins the party.
CPU Green Heart joins the party.
CPU White Heart joins the party.
Cleared the main scenario.
Helped a wounded ally during battle 20 times.
Assembled the legendary weapon, Wisdom Bow.
Assembled the legendary weapon, Trust Spear.
Assembled the legendary weapon, Dual Revolver.
Assembled the legendary weapon, Trinity Blade.
The truth about Arfoire is revealed.
Released Histoire's seal.
Obtained the Key Fragment in Leanbox.
Obtained the Key Fragment in Lowee.
Obtained the Key Fragment in Lastation.
Defeated the monster in town.
Neptune returns to the party.
But it was the best demo ever.
Reached 100 HIT with your original Combo.
Nisa joined the party.
Gust joined the party.
Created an original Combo.
Connected Combos using Combo Link.
Arrived at Leanbox.
Arrived at Lowee.
Returned to Planeptune.
Arrived at Lastation.
Changed your accessory.
Used Explore to advance the story.
Changed your processor unit.
You used your synthesized item during battle.
Fought in battle as a CPU.
Found a hidden treasure.
Encountered IF.
Had your first battle on your new journey.
Purchased something at the Shop.
Cleared the tutorial dungeon.
Lured out a monster.
Destroyed an obstacle.
Changed your formation.
Started your journey in Gamindustri.