Here is the full list of all 10 Chronus Arc trophies - there are 3 bronze, 6 silver and 1 gold.
Clear 5 missions.
Clear 15 missions.
Clear 25 missions.
Watch the ending.
Clear all quests in Kiribay.
Clear all quests in Sein.
Clear all quests in Gozless.
Clear all quests in Iatt.
Clear all quests in Bagas.
Clear all in-game quests.