The Dishonored were greatly influenced by the PC classic Thief: The Dark Project. To show their appreciation, you can find an easter egg in Mission 7: "Flooded District" at Daud's Base. Once there, look for the two guards in training. The speech you'll hear is the same as the tutorial mission from Thief. the Dark Project.
ACHIEVEMENT - HOW TO UNLOCK Alive Without Breath - You took possession of a fish. An Unfortunate Accident - You killed Morgan Pendleton with steam. Art Dealer - Collect all the Sokolov paintings. Back Home - Grab a live grenade and use it to kill an attacker. Big Boy - Kill a tallboy with only your sword. Bodyguard - You protected Callista's uncle, Captain Geoff Curnow. Capturing Genius and Madness - Complete the Bridge mission. Child Care - Find Emily Kaldwin. Clean Hands - Complete the game without killing anyone. Cleaner - Fight with 5 enemies at once, without any of them surviving. Creepy Crawly - You used a rat tunnel. Dishonored - Complete the Intro missions. Dunwall in Chaos - You completed the game in high chaos. Excommunication - Eliminate High Overseer Campbell. Faceless - After escaping Coldridge Prison, complete a single mission without alerting anyone. Food Chain - You assassinated an assassin. Gentleman Caller - You completed all the Granny Rags side missions. Ghost - Complete all missions after the prologue, alerting no one or killing no one but key targets. Harm's Way - Cause 5 unintentional suicides. Hornets' Nest - Kill 4 enemies in less than 1 second using the crossbow. Inhabitant - Stay in possession of others for most of a 3 minute period. Just Dark Enough - You completed the game in low chaos. King of the World - You reached the top of Kaldwin's Bridge. Lights Out - You deactivated at least 5 security systems on Kingsparrow Island. Long Live the Empress - You saved Empress Emily Kaldwin. Manipulator - Make others kill 5 of their own allies. Merchant of Disorder - Acquire 15 equipment upgrades. Mercy is the Mark - You spared Daud’s life. Mostly Flesh and Steel - Finish the game without purchasing any supernatural powers or enhancements, besides Blink. Occultist - Collect 10 bone charms. Poetic Justice - You neutralized all key targets using indirect means. Political Suicide - Expose the Lord Regent's crimes and bring about his arrest. Razor Rain - Kill 5 characters with Drop Assassination. Regicide - Assassinate the Lord Regent, Hiram Burrows. Resolution - Complete the game. Rogue - Assassinate 10 unaware enemies. Shadow - Complete all missions after the prologue without alerting anyone. Specter - After escaping prison, complete a mission without alerting anyone, and kill less than 5 people. Speed of Darkness - Travel 30 meters in less than 1 second. Street Conspiracy - You completed all the Slackjaw side missions. Surgical - Play from the first mission through Kaldwin's Bridge killing fewer than 10 characters. Tempest - Kill 6 enemies in less than 1 second. The Art of the Steal - You got the Art Dealer's safe combination for Slackjaw, but robbed the safe first. The Escapist - After Coldridge Prison, elude 5 pursuers at once without killing them or leaving the map. Thief - Pickpocket items worth a total of 200 coins. This Is Mine - Recover your belongings. Vanished - You escaped prison and navigated the sewers undetected. Versatile - Kill characters with each weapon and offensive gadget. Wall of Sparks - Kill an enemy using a Wall of Light. Well Mannered - You completed the Boyle Estate mission without spoiling the party.