Estimated Platinum Difficulty: 4/10
Offline Trophies: 46 (34, 8, 3, 1)
Online Trophies: 0
Approximate Time to Platinum: 50-80 hours
Minimum Playthroughs Needed: 1
Missable Trophies: 1 (Histoire Enthusiast)
Glitched Trophies: 0
Difficulty Affects Trophies: No
Cheats Disable Trophies: No cheats
(From the manual) Four goddesses preside over a parallel world called Gamindustri. Aside from the warring goddesses of Celestia, the human world below brims with monsters released by the evil powers of Arfoire. One girl, Neptune, falls to the human world during a scuffle between the goddesses. Once there, Neptune hears a cry from the tome Histoire, who has been sealed and kept away from the goddesses by Afoire.
This is a fairly easy platinum. It is a bit of a grind, but it can be done in one playthrough. Caution must be taken, because there are some monsters that only appear in story based dungeons that you cannot return to, making them missable.
"WARNING: Try not to let Neptune die. When she dies, the shares for all the lands decline, and the "Other" shares increases. You can permanently lose shares this way! See Histoire Enthusiast for more details."
Step 1: Complete the game. Do NOT recruit the goddesses
Complete the game as normal. Most of the trophies are either story based or easily gotten. Be sure to recruit Nisa and Gust for their events and the trophies Modest-Breasted Heroine and Business-Savvy Alchemist. Do be aware that some monsters only appear in story based dungeons and can be missed, so try to defeat every monster possible. If you do miss one, there is New Game+ which carries over your stats (See Step 3). Do NOT recruit the goddesses because the final boss is different on the normal ending and the true ending, and both forms are listed in the bestiary (needed for the trophy Histoire Enthusiast). After defeating the final boss, save the game and you'll be back at the World Menu and you can challenge the final boss as many times you like. Post-game opens up new events and side dungeons.
Step 2: Recruit the goddesses and defeat the final boss again
After defeating the final boss for the first time, recruit all three goddesses. In order to recruit a goddess, you must increase the goddess' landmass shares high enough to get events where you eventually will fight them one on one. After recruiting a goddess, continue to increase shares until you get the event "Unfortunate Black/White/Green Heart" before you start to recruit any other goddesses. Once you recruited all three, defeat the final boss in the true form. These steps will give you the trophies Green Heart, Black Heart, White Heart, and The Real Arfoire Stands Up.
Step 3: Cleanup and New Game+ (If needed)
Once you have the true ending, it is time to clean up. Make sure to visit every dungeon and get an S Rank on all side dungeons (DLC not included) for the trophies Multi-Platform and Speedy Hunter. See all the events, complete all the dungeons and complete the bestiary to earn Histoire Enthusiast. If you missed some enemies, you can use New Game+, which is accessed by loading up your save and in the World Menu, choose restart. This will start the game over, but you keep your weapons, items, and levels. It resets each land's shares and you have to recruit the goddesses, Nisa, and Gust again.
[PS3T Would Like to Thank stgermain for this Roadmap]