Here is the full list of all 48 Royal Alchemist achievements.
Unlock 1 unique death ending.
Unlock 3 unique death endings.
Unlock 7 unique death endings.
Unlock 13 unique death endings.
Unlock 17 unique death endings.
Unlock 24 unique death endings.
Reach 170 Beauty.
Reach 170 Combat.
Reach 170 Intelligence.
Reach 170 Leadership.
Reach 170 Charisma.
Reach 170 Etiquette.
Survive the assassins infiltrating the castle.
Survive the Royal Hunt with Serin or Nazir.
Survive the Sval trader.
Run and leave the assassins behind.
Do not get framed for a murder you didn't commit.
Survive the Sval trader II.
Get warned by Ceridwen in the end.
Get warned by Marigold in the end.
Get warned by Viola in the end.
Get warned by Issa in the end.
Succeed all Representative Missions.
Get the Garrison's support.
Reach Serin's Romance Ending.
Reach Nazir's Romance Ending.
Reach Aurelius' Romance Ending.
Reach the Generic Ending.
Reach Serin's Bad Ending.
Reach Serin's Friendship Ending.
Reach Nazir's Friendship Ending.
Reach Aurelius' Friendship Ending.
Reach all endings.
Save a child victim.
Find all clues about the antagonist.
Find all clues about the second antagonist.
Use your time wisely on social events.
Unlock all of Serin's mission illustrations.
Unlock all of Nazir's mission illustrations.
Unlock all of Aurelius' mission illustrations.
Unlock all of Other's mission illustrations.
Successfully create the Truth Serum.
Spend a fortune on a bed you won't use.
Spend money on almsgiving.
Spend money to reallocate children.
Improve the brother's cooperation.
Give a good response on a tea party.
Successfully work at the Whitehart.