Here is the full list of all 37 THIEF achievements worth 1,000 gamerscore. It takes around 40-50 hours to unlock all of the achievements on Xbox One.
Used 40,000 gold
Finished the game on Master difficulty
Completed all collectible sets
Completed 25 optional Thieving Objectives
Picked 100 pockets in a single playthrough
Finished the game without a single kill or knockout
Picked a pocket and a lock using the focus ability
Scored an epic 5,000,000 or more in a Challenge Map
Finished 3 consecutive chapters without taking damage
Stole all loot and collectibles in a single chapter.
Finished Chapter Eight
Finished the game in 15 hours or more
Finished Chapter Seven
Completed all Basso Jobs in The City
Completed all Client Jobs in The City
Completed a collectible set
Finished Chapter Six
Finished Chapter Five
Completed 10 optional Thieving Objectives
Finished a single chapter without alerting anyone
Finished Chapter Four
Disarmed ten trap mechanisms
Picked a lock with masterful speed
Finished Chapter Three
Discovered 15 secret areas
Killed or knocked out 10 people using the environment
Sweet sixteen. Snuff said.
Finished Chapter Two
Finished Chapter One
Stole 5 collectibles
Uncovered Lyegrove's secret
Finished the Prologue
Finish the game with a custom difficulty of 700 points or more
Reach the final chapter without using the focus ability
Shoot a bottle in mid-air with an arrow
Discover all secret areas
Find all the secret stashes in Moira