Full list of all 80 Dishonored achievements. It takes around 25-30 hours to unlock all of the achievements in the base game on Windows.
The base game contains 50 achievements, and there are 3 DLC packs containing 30 achievements.
Eliminate High Overseer Campbell
Complete the Intro missions
Pickpocket items worth a total of 200 coins
Kill characters with each weapon and offensive gadget
Complete all missions after the prologue, alerting no one or killing no one but key targets
Complete all missions after the prologue without alerting anyone
Finish the game without purchasing any supernatural powers or enhancements, besides Blink
Kill an enemy using a Wall of Light
Assassinate 10 unaware enemies
After escaping prison, complete a mission without alerting anyone, and kill less than 5 people
After escaping Coldridge Prison, complete a single mission without alerting anyone
Make others kill 5 of their own allies
Kill 5 characters with Drop Assassination
Play from the first mission through Kaldwin's Bridge killing fewer than 10 characters
Complete the game without killing anyone
Cause 5 unintentional suicides
Stay in possession of others for most of a 3 minute period
Kill 4 enemies in less than 1 second using the crossbow
Travel 30 meters in less than 1 second
Kill 6 enemies in less than 1 second
Acquire 15 equipment upgrades
Collect all the Sokolov paintings
Collect 10 bone charms
After Coldridge Prison, elude 5 pursuers at once without killing them or leaving the map
Fight with 5 enemies at once, without any of them surviving
Find Emily Kaldwin
Complete the Bridge mission
Assassinate the Lord Regent, Hiram Burrows
Expose the Lord Regent's crimes and bring about his arrest
Recover your belongings
Complete the game
You completed the game in high chaos
You completed the game in low chaos
You escaped prison and navigated the sewers undetected
You completed all the Granny Rags side missions
You completed all the Slackjaw side missions
You got the Art Dealer's safe combination for Slackjaw, but robbed the safe first
You killed Morgan Pendleton with steam
You completed the Boyle Estate mission without spoiling the party
You reached the top of Kaldwin's Bridge
You protected Callista's uncle, Captain Geoff Curnow
You spared Daud’s life
You deactivated at least 5 security systems on Kingsparrow Island
You saved Empress Emily Kaldwin
You neutralized all key targets using indirect means
You assassinated an assassin
You took possession of a fish
You used a rat tunnel
Grab a live grenade and use it to kill an attacker
Kill a tallboy with only your sword
Deliver (or attempt) the killing blow on Corvo
Break Lizzy Stride out of Coldridge Prison
Restore the Undine to working condition
Purchase at least 8 favors in The Brigmore Witches
Complete The Brigmore Witches in High Chaos
Complete The Brigmore Witches in Low Chaos
Complete The Brigmore Witches without alerting anyone
Complete The Brigmore Witches without killing anyone
Survive The Brigmore Witches in low chaos with 10,000 coins
Use an enemy lifted with Pull as a shield
Find Emily's doll hidden in each of the 10 challenges
Complete all Normal and Expert challenges with a 3-Stars rating
Get to Wave 13 in Back Alley Brawl killing all combatants personally
Complete Train Runner before the train arrives at the station
Find all of the collectable figurines in Burglar on Expert
Perform a drop assassination of at least 150 meters in the Kill Cascade challenge
Complete Assassin's Run with 100% accuracy using only head shots
In Bonfires, perform all the special combination jumps in 1 round
Finish Mystery Foe without using any active supernatural powers
Finish Chain Kill or Bend Time Massacre without failing any wave, including bonuses
Get the information you need from the Rothwild Slaughterhouse
Meet with Thalia Timsh, the Barrister's Niece
Purchase all of the Favors in The Knife of Dunwall
Complete The Knife of Dunwall in High Chaos
Complete The Knife of Dunwall in Low Chaos
Complete The Knife of Dunwall without alerting anyone
Complete The Knife of Dunwall without killing anyone
Attach an arc mine to a rat, resulting in a kill
Perform a drop assassination from atop the Empress statue in The Knife of Dunwall
Speak with the statue of Delilah Copperspoon in Timsh's estate