Here is the full list of all 22 Ladra achievements.
Quick like lightning. Finish the game in under 1 hour.
Complete one chapter undetected
Complete all chapters undetected
Get all treasure in one chapter
Get all treasure in all chapters
Steal from three chief guards
Unlock your first chest
Unlock all chests in the game
Have one converstation in the Valoruke
Have all the available conversations with one character in the Valoruke
Have all the available conversations with all characters in the Valoruke
Find one book hidden throughout the game
Find all books hidden throughout the game
Find all the peculiar guards
Steal from seven chief guards