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.
You completed all the Slackjaw side missions
Cause 5 unintentional suicides
You got the Art Dealer's safe combination for Slackjaw, but robbed the safe first
You killed Morgan Pendleton with steam
You completed the game in low chaos
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
Complete the game without killing anyone
Finish the game without purchasing any supernatural powers or enhancements, besides Blink
You spared Daud’s life
You neutralized all key targets using indirect means
You completed the Boyle Estate mission without spoiling the party
Play from the first mission through Kaldwin's Bridge killing fewer than 10 characters
After escaping prison, complete a mission without alerting anyone, and kill less than 5 people
You escaped prison and navigated the sewers undetected
Kill 5 characters with Drop Assassination
Kill 6 enemies in less than 1 second
Collect all the Sokolov paintings
You completed the game in high chaos
Complete the game
You saved Empress Emily Kaldwin
You deactivated at least 5 security systems on Kingsparrow Island
Stay in possession of others for most of a 3 minute period
Grab a live grenade and use it to kill an attacker
Kill 4 enemies in less than 1 second using the crossbow
Make others kill 5 of their own allies
After Coldridge Prison, elude 5 pursuers at once without killing them or leaving the map
Kill characters with each weapon and offensive gadget
You completed all the Granny Rags side missions
Travel 30 meters in less than 1 second
You assassinated an assassin
Recover your belongings
Assassinate the Lord Regent, Hiram Burrows
Expose the Lord Regent's crimes and bring about his arrest
You used a rat tunnel
Kill a tallboy with only your sword
You took possession of a fish
Complete the Bridge mission
Kill an enemy using a Wall of Light
Pickpocket items worth a total of 200 coins
You reached the top of Kaldwin's Bridge
Fight with 5 enemies at once, without any of them surviving
Acquire 15 equipment upgrades
After escaping Coldridge Prison, complete a single mission without alerting anyone
Find Emily Kaldwin
Eliminate High Overseer Campbell
You protected Callista's uncle, Captain Geoff Curnow
Assassinate 10 unaware enemies
Collect 10 bone charms
Complete the Intro missions
Survive The Brigmore Witches in low chaos with 10,000 coins
Complete The Brigmore Witches in Low Chaos
Complete The Brigmore Witches without alerting anyone
Complete The Brigmore Witches without killing anyone
Complete The Brigmore Witches in High Chaos
Purchase at least 8 favors in The Brigmore Witches
Restore the Undine to working condition
Use an enemy lifted with Pull as a shield
Break Lizzy Stride out of Coldridge Prison
Deliver (or attempt) the killing blow on Corvo
Finish Chain Kill or Bend Time Massacre without failing any wave, including bonuses
In Bonfires, perform all the special combination jumps in 1 round
Get to Wave 13 in Back Alley Brawl killing all combatants personally
Complete Assassin's Run with 100% accuracy using only head shots
Complete all Normal and Expert challenges with a 3-Stars rating
Find all of the collectable figurines in Burglar on Expert
Find Emily's doll hidden in each of the 10 challenges
Perform a drop assassination of at least 150 meters in the Kill Cascade challenge
Complete Train Runner before the train arrives at the station
Finish Mystery Foe without using any active supernatural powers
Complete The Knife of Dunwall in Low Chaos
Complete The Knife of Dunwall without alerting anyone
Complete The Knife of Dunwall without killing anyone
Purchase all of the Favors in The Knife of Dunwall
Complete The Knife of Dunwall in High Chaos
Perform a drop assassination from atop the Empress statue in The Knife of Dunwall
Meet with Thalia Timsh, the Barrister's Niece
Speak with the statue of Delilah Copperspoon in Timsh's estate
Attach an arc mine to a rat, resulting in a kill
Get the information you need from the Rothwild Slaughterhouse