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.
Obtained all content.
Obtained S rank in all Time Challenges.
Been everywhere in Gamindustri.
Switched with back-row members in battle 50 times.
Cleared the main scenario.
Defeated Arfoire with the power of all CPUs combined.
CPU White Heart joins the party.
CPU Green Heart joins the party.
CPU Black Heart joins the party.
Assembled the legendary weapon, Trust Spear.
Assembled the legendary weapon, Wisdom Bow.
Helped a wounded ally during battle 20 times.
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.
Reached 100 HIT with your original Combo.
Neptune returns to the party.
Obtained the Key Fragment in Lowee.
Defeated the monster in town.
Connected Combos using Combo Link.
Obtained the Key Fragment in Lastation.
But it was the best demo ever.
Gust joined the party.
Nisa joined the party.
Changed your accessory.
Fought in battle as a CPU.
Changed your processor unit.
Created an original Combo.
Arrived at Lowee.
Returned to Planeptune.
Arrived at Leanbox.
Used Explore to advance the story.
Found a hidden treasure.
Arrived at Lastation.
Changed your formation.
You used your synthesized item during battle.
Had your first battle on your new journey.
Encountered IF.
Purchased something at the Shop.
Cleared the tutorial dungeon.
Lured out a monster.
Destroyed an obstacle.
Started your journey in Gamindustri.