Here is the full list of all 49 Regalia: Of Men and Monarchs achievements.
Complete the game. Thanks for playing!
Max out Esther's Personal Bond.
Max out Riehl's Personal Bond.
Max out Haksun's Personal Bond.
Max out Signy's Personal Bond.
Reach Party Level 20.
Max out Grenn's Personal Bond.
Max out Levant's Personal Bond.
Max out Theo's Personal Bond.
Max out Aliss' Personal Bond.
Max out Gunther's Personal Bond.
Complete Chapter 6.
Vanquish the Fomorian Ancient.
Win 50 battles.
Unlock 30 Codex entries.
Complete Chapter 5.
Complete 25 Text Adventures.
Vanquish the Visage of Anguish.
Complete Chapter 4.
Max out Shichiroji's Personal Bond.
Win the negotiations by exposing Bink.
Max out Diego's Personal Bond.
Max out Griffith's Personal Bond.
Complete Chapter 3.
Max out Baz and Lilka's Personal Bond.
Reach Party Level 10.
Complete Chapter 2.
Clear 3 Dungeons.
Complete Chapter 1.
Complete 5 challenges.
Unlock 5 Codex entries.
Complete a Text Adventure.
Win your first battle.
Max out Henrietta's Personal Bond.
Max out Valen's Personal Bond.
Max out Mifune's Personal Bond.
Max out Miri's Personal Bond.
Max out Winter's Personal Bond.
Successfully placate the three feuding parties.
Win the negotiations by exposing Tag.
Win the negotiations by eliminating both Tag and Bink.
Fish out the legendary item.
Complete 50 challenges.
Clear 15 Dungeons.
Craft 25 items.
Craft 100 items.
Catch 25 fish.
Fish out 10 items.
Carry on the legacy of the fallen hero.