Here is the full list of all 51 Res Judicata: Vale of Myth achievements.
Lose the tutorial battle. It's been a bad day.
Put an end to the Culebre terrorizing Toledo!
One chance only! Defeat Olaf in the Toledo tavern.
Get robbed of the prize money.
Help a Spanish prisoner get a fresh start in life.
Win 50 battles.
Win 125 battles.
Win 250 battles.
Win 1,000 battles.
Kill 5 elite monsters!
Stand among legends - slay 15 elite monsters!
Kill 50 elite monsters!
Help someone who outright wronged you.
Earn an early release from jail.
Destroy the Jack-o-Lantern for good.
Kill the Garguiem.
Fight off a bandit raid with minimal casualties.
Took time to recover from a loss in the family.
Evade the reaper without being seen once!
Put an end to the Kornikaned's schemes.
Help excise a child from a demon.
Pursue your quarry through the Catacombs.
Woo a succubus out of her own dark nature!
Help an old lady remember all of her inconsequential groceries.
Rescue Mr. Nibbles from nefarious clutches.
Uncover the truth behind the recent murder.
Fill out your team of adventurers.
Fight and win 25 consecutive battles (no fleeing).
Fight and win 100 consecutive battles (no fleeing).
Traverse difficult terrain in the least number of moves.
Break the rules that none shall break.
Cheated death... again.
Help those in Toledo to the utmost of your ability.
Help those in Whispering Falls to the utmost of your ability.
Help those in Paris to the utmost of your ability.
Help those in Venice to the utmost of your ability.
Finish half of the side-quests in Chapter 1.
Finish all of the side-quests in Chapter 1!
Speak to every character (even hidden ones) in the game.
Find every secret!
Loot every single treasure chest!
Spend over 5,000 gold coins at stores!
Complete Chapter 1 like a boss.
Unlock and listen to every skit.
Complete Chapter 1 without saving once.
Complete half the bestiary.
Complete the entire bestiary!
One chance only! Do not suffer a single defeat.
Beat Chapter 1 without using an item!
Earn all achievements!
Defeat "The Lion," first bested by Casazampieri!