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