Here is the full list of all 33 Liege Dragon achievements.
First character joined the party.
Party members increased.
Watched the opening.
All characters joined the party.
Discovered the true identity of the man with the black cape.
The Holy Dragon has retrieved its memory.
Discovered Ibriss Prince's true identity.
Confronted Abigore the Evil Dragon.
Obtained the normal ending.
Obtained Louise's ending.
Obtained Rugal's ending.
Obtained Silky's ending.
Obtained Alranne and Claire's ending.
Obtained the happy ending.
Walked 50,000 steps.
Walked 100,000 steps.
Walked 200,000 steps.
Collected 50 treasure chests.
Collected 100 treasure chests.
Collected 200 treasure chests.
Upgraded weapons 10 times.
Upgraded weapons 50 times.
Upgraded weapons 100 times.
Dealt 5,000 max damage to enemies.
Dealt 10,000 max damage to enemies.
Dealt 30,000 max damage to enemies.
Defeated 100 enemies.
Defeated 500 enemies.
Defeated 1,500 enemies.
Collected 10 monsters of the monster guide.
Collected 50 monsters of the monster guide.
Completed the monster guide.
Cleared all subquests.