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The Chemical Revolution was a virtual representation of one of Arno Dorian's genetic memories, relived by a Helix initiate through the Helix Navigator.


Arno found a distressed Marie-Anne Paulze Lavoisier and discovered that her husband had gone missing.


  • Madame Lavoisier: What am I to do? Where can my husband be?
  • Arno: Madame Lavoisier? What's the matter?
  • Madame Lavoisier: My husband and I were about to conduct an experiment on a poisonous gas, but he went for a walk and hasn't returned! I'm worried about those hooligans who follow Marat! Who knows what they might have done. They're often found near the Panthéon.
  • Arno: Don't worry. I'll find him.

Arno made his way to the Panthéon and managed to locate Marat's thug. Tracking him, Arno found a building near the Bièvre where Lavoisier was being kept.

  • Thug 1: Look, old man, scribbles on paper don't tell us much. How does it work?
  • Lavoisier: Hardly "scribbles", dear fellow; each line details a step in the process. It's quite fascinating, actually, if one-
  • Thug 1: Shut it! Philippe's got the paper, he'll figure it out. If not, well, maybe your wife can help us.
  • Lavoisier: What?

Arno killed the thugs and spoke to Lavoisier.

  • Lavoisier: They took my formula, we can't let them use it! It's an improvement on the smoke bombs I developed for you Assassins to make them poisonous. Some fellow here has it.
  • Arno: I'll find it. You go reassure your wife.

Arno located a building nearby and entered it, finding two thugs examining one of Lavoisier's bombs.

  • Thug 2: We've got to find somebody who can und-

The two thugs accidentally detonated the bomb, causing the building to catch fire. After escaping the house, Arno saw more of Marat's thugs and killed them as well, finding the formula on one of their bodies. Arno then returned to Lavoisier's residence.

  • Madame Lavoisier: Arno! We're so glad to see you!
  • Lavoisier: My good fellow! And the formula is safe?
  • Madame Lavoisier: We knew you'd put things right.


Arno rescued Lavoisier and managed to recover his formula.


Assassin's Creed: Unity memories
Main memories
The Tragedy of Jacques de Molay
Sequence 1
Memories of Versailles - The Estates General - High Society
Sequence 2
Imprisoned - Rebirth
Sequence 3
Graduation - Confession - Fin de Siecle
Sequence 4
The Kingdom of Beggars - Le Roi Est Mort
Sequence 5
The Silversmith - La Halle aux Blés - The Prophet
Sequence 6
The Jacobin Club - Templar Ambush
Sequence 7
A Cautious Alliance - Meeting with Mirabeau - Confrontation - The Resistance
Sequence 8
The King's Correspondence - September Massacres
Sequence 9
Starving Times - Hoarders - The Escape
Sequence 10
A Dinner Engagement - The Execution
Sequence 11
Bottom of the Barrel - Rise of the Assassin - The Bastille
Sequence 12
The Supreme Being - The Fall of Robespierre - The Temple
Cooperative missions
Women's March - The Food Chain - The Austrian Conspiracy - Political Persecution - The Tournament - Heads Will Roll - Les Enragés - Danton's Sacrifice - Moving Mirabeau - Jacobin Raid - The Infernal Machine
Tithing Templars - Catacomb Raider - The Party Palace - Royals, Guns and Money - Smuggler's Paradise - Ancient History - It Belongs in a Museum
Paris stories
Tall, Dark Strangers - Flamel's Secret: The Monks - Flamel's Secret: Denis Molinier - Flamel's Secret: The Elixir of Life - Using the Ol' Noggins - Waxworks - Sewer Rat - À la Lanterne! - The Great Escapist - Critical Comedown - Scene Stealer - Devilishly Tricky - My Kingdom For Some Whores - De Sade's Reprieve - Sadistic Blackmail - The Cult of Baphomet - The Ritual of Baphomet - La Bande Noire - Iscariotte, the Giant - Headlining the Guillotine - A Fistful of Duelers - The League of the Crimson Rose - Return of the Crimson Rose - Crimson Sunset - Flying Boy - Carmalite Nuns - Stop the Presses! - Encyclopédie Diderot - Désirée Desired - Désirée Dismayed - Désirée Delighted - French Crown Jewels - Coat of Arms - Swiss Stash - Vicious Verses - Arm the People - "Escort" Mission - Cassini's Constellations - The Condorcet Method - A Romantic Stroll - Signaling Officer Murat - A Nice Chappe - Precious Correspondence - Constructing a "Close Shave" - Up in Arms - Marianne Returns Home - The Little Prince - Turtle, Snake, Bear, Paper, Scissors - Tapestry Thief - Cartouche's Memoirs
Café Théâtre missions
Explore the Café Théâtre - Auto-Da-Fé - Colette - Damsel in Seamstress - The Queen's Necklace - Foxy Renard
Social Club missions
Bridge Brigands - Marat's Missive - Let Them Eat Hay - Cat Food on a Hot Tin Roof - Hoarding Hostages - Café Procope - Roux's Remains - An Engaging Egyptologist - Artful Dodger - A Dramatic Exit - Breaking the Habit - Extortion Contortion - Chouan Riddles - Bara's Funeral - Retribution for a Rabble-Rouser - The Black Office - Betrayer of the Queen - Spiked Bourbon - Special Delivery - Smoky Yet Robust
Murder mysteries
Murder Foretold - Barber of Seville - The Body in the Brothel - Ancestral Vengeance - The Body Politic - Bones of Contention - The Assassination of Jean-Paul Marat - Hot Chocolate to Die For - The Hand of Science - The Decapitated Warden - The Death of Philibert Aspairt - The Red Ghost of the Tuileries - Cut the Middle Man - A Dash of Poison
Nostradamus Enigmas
Mercurius - Venus - Terra - Mars - Jupiter - Saturnus - Aries - Taurus - Gemini - Cancer - Virgo - Leo - Libra - Scorpio - Sagittarius - Capricorn - Aquarius - Pisces
American Prisoner - The Chemical Revolution - Killed by Science
Dead Kings
Sequence 13
Buried Words - The Book Thief - A Shadow from the Past - Raising the Dead - Under Lock and Key - A Crown of Thorns
Cooperative and heist missions
Last Rites - Holy High Rollers
Stories of Franciade
Last Will - A Royal Hide - The Unopened Rose - The Eyes of the King
Murder mysteries
Blind Justice - Equal Justice
Suger's Legacy
I - Nativitatis Et Mortis - II - Morbum - III - Diabolus - IV - Natura - V - Crux - VI - Noctis - VII - Dies