Video Game / Opus Magnum

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Opus Magnum is a Programming Game from Zachtronics Industries that draws inspiration from real world alchemy. Using a transmutation engine that is effectively the fantasy equivalent of SpaceChem's atomic reactors, you separate, bond, and transform atoms from one form to another, programming the machines you place onto the transmutation engine's workspace to make it happen.

Like SpaceChem's 'fake chemistry', Opus Magnum takes its cues from 'real' alchemy: Only the classic elemental primes, neutral salt, and a handful of metals^note The seven metals of antiquity; mercury/quicksiver, lead, tin, iron, copper, silver and gold. are used to create every molecule you construct in the game. The game draws many ideas from one of Zach's previous games, The Codex Of Alchemical Engineering, including all the component atoms save sulfur, and arms and glyphs to manipulate the atoms and molecules you'll be working with, now on a hexagonal working space instead of Codex's orthogonal board.

In a departure from the usual approach of Zachtronics games, you take on the role of a named character — Anataeus Vaya, an ambitious young man about to graduate from the Imperial University. The story follows his graduation and employment as the Head Alchemist of House Van Tassen. He chafes under the restrictions of his position and the politics of high society, but quickly finds himself scrambling to fight back when House Van Tassen comes under attack.

Despite the disbanding of Zachtronics, the team behind Opus Magnum collaborated with a group of fan modders to develop a new campaign for the game with additional mechanics. A prequel following an entirely new protagonist, the DLC titled De Re Metallica was released on March 17, 2026.

This game provides examples of:

• Abhorrent Admirer: Frederick Van Tassen is described to be an undesirable partner in some way, with the task for Stamina Potion suggesting he's sickly and/or weak. His father, Armand, arranged dates between him and Clara Soria. However, everyone's assumptions that she was put off by his appearance are false. In fact, Clara genuinely liked the guy and was enraged by his death, leading her to join the protagonists' revenge quest against House Colvan.
• Alchemy Is Magic: Repeatedly defied. When Concordia compares him to a wizard, Anataeus protests that alchemy is a science and an engineering discipline, not magic.
• And You Thought It Was a Game: For generations the Houses have engaged in low-stakes "wars" where they'll fight for a bit before one side cedes a few streets. House Van Tassen treats the war with Colvan as more of this posturing, only realizing when it's too late that Taros isn't playing by the rules.
• Artistic License – Physics: Even more so than SpaceChem. The setting this game takes place in runs on fantasy physics, where alchemy is a fact of nature. The creators actively encourage players to consider the game's setting and aesthetics when designing submissions for the in-game Journal of Alchemical Engineering.
• Authority in Name Only: The story makes several references to an imperial authority, hinting that the story takes place in an empire. However, the emperor seems powerless to intervene in concrete political affairs. The Imperial alchemist guild issues certifications to alchemy graduates, but the houses can start civil wars and steal territory from each other without repercussion. Taros Colvan destroyed and massacred one of the Empire's most prestigious houses, with absolutely no worries about the reaction of the imperial authority.
• Bond Villain Stupidity: In De Re Metallica, Verrin Ravari probably should have known better than locking up two alchemists, who had just demonstrated to him how to break the laws of physics with metallurgy, inside a mostly metallic room with their transmutation engine.
• Bookends: The tutorial levels end with Anataeus and his classmate Henley discussing their plans after graduation, and Henley wishes that "each of us realize (his) opus magnum". At the end, Verrin Ravari, realizing his plans were for naught, laments the loss of his opus magnum.
• Brutal Bonus Level: After the main campaign is completed, you get access to the "Production Alchemy" puzzles, which require creating solutions in a limited space and with some new mechanics. The optional "Journal of Alchemical Engineering" has some difficult levels as well.
• Chekhov's Gun: Exploiting metals by the means introduced in De Re Metallica turns out to have disastrous consequences, destroying the in-operation transmutation engine and causing an accident that only by hair's breadth didn't kill anyone. The protagonists set up an engine malfunction, intentionally this time, to free themselves from the room the head alchemist of House Colvan keeps them in.
• Clear My Name: Verrin attempts to clear the murder accusations made against him by exposing Anataeus, the actual creator of the poisoned lipstick. However, he fails to catch him or procure any evidence because Anataeus fled and destroyed the incriminating Transmutation Engine he used beforehand.
• Continuity Nod: The De Re Metallica DLC contains many references to the events of the main campaign and even those mentioned in the Journal puzzles' flavor text:
  • The alchemical symposium includes a talk by one H.Servin — Anataeus' friend from the tutorial — about a possible method of isolating quintessence, and we know from the Journal he's on the right track.
  • One Journal page has a puzzle for creating "Ravari's Wheel", which is clearly meant to be a metal equivalent to Van Berlo's Wheel named after Verrin Ravari. In De Re Metallica, the protagonists do end up trying to get Ravari's attention to help their research and Ravari's Wheel is an actual mechanism they can use in certain puzzles.
• Corrupt Bureaucrat: The alchemists employed by the major houses tend to be more interested by inserting themselves into politics and furthering their political interests than actually practicing alchemy. Concordia tells Anataeus that the vast majority of the previous alchemists who worked for the Van Tassen seldom set foot in the alchemy lab and that Anataeus is the first Van Tassen alchemist in generations to actually focus on alchemy.
• Dawn of an Era:
  • De Re Metallica ends with a textbook page from an unspecified future epoch, describing the main characters' inventions as this for metallurgy and alchemy in general.
  • The final page of the Journal's volume CVIII describes some highlights from the first new alchemical conference — the Exposition — aimed at a worldwide free exchange of ideas, opposing itself to the elitist, ivory-tower Alchemical Symposium of old and continuing the democratising trend Saverio and Pier inadvertently began.
• Deadpan Snarker:
  • Concordia Lem, House Van Tassen's Provisioner and natural foil to Anataeus's egotistical genius.
  • In De Re Metallica, Pier Pugano fulfills a similar role in the employ of Saverio Daas.
• Decoy Getaway: The Head Alchemist of House Colvan has found Anataeus in his hideout, but the Mists of Hallucination and a spare mannequin reveal that Anataeus and Concordia are long gone.
• Destroy the Evidence: To hide his involvement in the plot to kill the head of House Colvan, Anataeus sets up his Transmutation Engine to produce Universal Solvent, one of the greatest achievements in classical alchemy, in order to make it destroy itself and any possible traces of other substances he has produced recently.
• Dramatically Missing the Point: Anataeus tries to convince his patrons that a war cannot be won by assigning him to make hair gel. Captain Gelt insists that having Frederick Van Tassen show up with impeccable hair to raise a sword will inspire the troops enough to turn the tide of the war. It doesn't.
• Dramatic Irony: In the second chapter of the De Re Metallica campaign, the two alchemists discuss at one point that House Colvan is probably planning a parade, judging from the items they are producing for House Colvan. Of course, the player will most likely realize instantly that these items will be used to facilitate the destruction of House Van Tassen.
• Drugged Lipstick: The penultimate puzzle has Anataeus synthesize a substance referred to as Curious Lipstick, which Clara Soria will wear to the Fortunatus Ball in order to take revenge on Taros Colvan, invited as one of the guests of honor. The alchemist notes that "she'll get the nonlethal dose as long as she doesn't lick her lips."
• Element Number Five: The optional Journal of Alchemical Engineering introduces quintessence, which is made by combining the four cardinal elements together using a dedicated glyph; inversely it can also be decomposed into its constituent elements with a different glyph. Despite this, some alchemists are still trying to produce aether as an alternative "ultimate element".
• Equivalent Exchange: The Glyph of Proliferation introduced in the DLC seems to violate this rule at first glance, being able to directly transmute a quicksilver atom into any higher metal without any other materials compared to the Purification or Projection glyphs. It's then revealed that it makes up for the difference by siphoning metal from the surrounding environment, with potentially disastrous results if used on a large scale.
• Event-Based Character Portrait:
  • Captain Gelt is portrayed in armor when he is about to head to fight.
  • After the fall of House Van Tassen, Anataeus and Concordia are shown wearing shabby clothes and they get rid of the insignia.
  • As part of a plot to acquire lead ore for further operation, Anataeus alchemically synthesizes a Very Dark Thread and Concordia weaves it into a nearly pitch-black hooded cloak. Nils, the thief they hired for the job, is equipped with the stealth cloak and his portrait shows him wearing it after the puzzle is complete.
  • Clara Soria wears the Alchemical Jewel on her tiara after the player finishes the corresponding puzzle.
  • After Verrin Ravari is fired from the service of the House Colvan and later framed as a murderer of Taros Colvan, his character portrait displays him roughed up after a fight with the guards and missing a decorative chestpiece that designated him Head Alchemist.
• Evolving Title Screen: After solving the last objective of De Re Metallica, the background that depicts the workshop-turned-prison that the main characters were trapped in shows it ruined, with the metal door and walls full of massive holes chewed out by the Transmutation Engine.
• Fission Mailed: In the DLC, upon delivery of the last required output molecule in the final puzzle, the design area is flooded with cascading errors and detached tiles. That's the Transmutation Engine consuming itself to compensate for the violation of the laws of Equivalent Exchange, induced by massive intentional overuse of experimental glyphs.
• Foreshadowing: Playing Sigmar's Garden unlocks additional conversation where Concordia mentions that Anataeus is the only alchemist she has met that is actually focused on alchemy: all the previous Van Tassen alchemists spent most of their time getting involved in House politics. Much later in the game Verrin Ravari, alchemist of House Colvan, is revealed to have been planning to usurp House Colvan, with the destruction of Van Tassen laying the groundwork.
• Frame-Up: Part of the unspoken plan is arranging events to frame Verrin Ravari for creating the poisoned lipstick that kills Taros.
• Gameplay and Story Integration:
  • After suddenly finding himself in a resource-starved working environment, the first puzzle of the chapter is Anataeus building an alchemical engine to convert common cheap alcohol into a steady supply of basic elements necessary to get much of anything done.
  • During the post-puzzle conversation of "Very Dark Thread", Anataeus mentions they've used up their last supplies of mercury/quicksilver to make the eponymous thread. Starting with the next chapter, he has to use the "Glyph of Purification" to turn metals into their higher forms without mercury.
  • The "Production Alchemy" foreword notes that the near-infinite workspace of the main story's alchemy engine is a modern convenience generally available only to labs and noble houses. The puzzles which follow use engines from a "production" environment which have limited workspace available.
  • In the DLC, the goal of "Pattern Metal" is to abuse the Glyph of Proliferation's metal siphoning property to break down the jail cell holding the protagonists hostage. Finishing the puzzle causes the screen to glitch out and fill with error messages, signifying that the alchemical engine itself is totaled as a consequence.
• Gameplay and Story Segregation: Even though the Glyph of Proliferation is stated to be actively harmful to both the Alchemical Engine and the surrounding environment when used, the Journal introduces several puzzles where you can freely use it (with no explanation as to whether the above problem is fixed), since presumably limiting an entire game mechanic due to lore reasons would not be very fun.
• Gameplay Grading: After completing a puzzle, the cost of your machine, the number of cycles to complete, and the area used for the machine are recorded. They are then marked on a histogram of how other players have done on the puzzle, giving you an idea of how you compare.
• Game Within a Game: Sigmar's Garden is a solitaire-like game based around clearing a hex-grid board of coloured balls with alchemy-inspired rules. Anataeus isn't too keen on the alchemical liberties taken.
• Gaslamp Fantasy: Much of the game's art direction and aesthetics are inspired by this, with artwork that depicts characters wearing elaborate outfits, intricately detailed interiors, and airships. The architecture of the Great Houses and major landmarks such as the university grounds dominate the landscape of the city, resembling cathedrals and industrial palaces that dwarf everything else. Even taking the map's emphasis of these locations as a Broad Strokes depiction, they must tower over the surrounding buildings.
• Gentleman Thief: Nils Whittle, who manages to steal a shipload of lead from the Van Tassen estate for Anataeus and Concordia, is actually a high-level spy in employ of Clara Soria.
• The Greatest Story Never Told:
  • Anataeus wistfully bemoans that the story of how he manufactured the Universal Solvent (one of the aspirations of classical alchemy) will never be known, but survival and their revenge against House Colvan hinging on no evidence of his work remaining wins out over his desire for recognition. Ironically, the only evidence of his survival after the timeskip were traces of the solvent.
  • The protagonists of De Re Metallica go through significant trials developing their alchemy before sharing the discovery with Clara. A textbook written years later reveals that the only things known about either of them are their names, their creations, and some broad speculation about their background.
• Heal It With Fire: "A Time of Medical Advances" edition of the Journal features Blood-Stanching Powder. Its molecule is composed from ten fire atoms out of eighteen total.
• Honor Before Reason: House Van Tassen's military tactics amount to a lot of posturing and bluster, as Captain Gelt is positive that a few rockets will completely rout the House Colvan advance. When House Colvan slaughters the entirety of the Van Tassen line, it comes as a major shock to everyone involved.
• Inadequate Inheritor: Frederick Van Tassen is never seen, but most conversations indicate he is less intelligent, ambitious, and cunning than his father.
• Insufferable Genius:
  • Anataeus is very much one. The tutorial's storyline is about him swotting up on the principles of automated alchemy for his final exam before graduating; prior to this, he'd been doing all his labwork by hand, without realizing how powerful and convenient modern alchemy is. When he mentions that he finds the term "opus magnum" to be rather pretentious, his classmate scoffs at his lack of self-awareness.
  • The Head Alchemist of House Colvan gives off this vibe as well, but his ability doesn't quite measure up to his boasts.
  • Saverio from the DLC is hardly better. He invented reductive metallurgy, a new paradigm that can revolutionize the entire field of alchemy, but his self-aggrandizing attitude and tendency to overpromise what his inventions can achieve means that no one takes his theories seriously until the end.
• Kiss of Death: Clara commissions and wears the Curious Lipstick in order to give a deadly kiss to Taros.
• Liquid Courage: Anataeus synthesizes a so called "Courage Potion" for Captain Gelt before the latter has to head into battle. The associated puzzle reveals that the main ingredient is distilled alcohol.
• Magitek: The transmutation engine is an atomic manipulator with magical parts that use the classical elements to perform traditional alchemy. Think the WALDOs in SpaceChem with alchemy thrown in.
• The Man Behind the Man: Verrin Ravari claims he manipulated Taros into starting the war between the Houses.
• Mayor Pain: The city where the story takes place is ruled by noble houses that are portrayed as decadent, self-centered, full of themselves, superficial, incompetent and oblivious to the real state of politics. Few to none of the alchemical compounds the Van Tassen asked Anataeus to produce were created for the population, most of them were for the house's own profit. Although the population does not seem to suffer from these politics (at least not to the point of public unrest), the antagonists plan on using the weakness of the houses to seize control of the city.
• Mini-Game: Sigmar's Garden is a match-the-marbles game with its own set of rules flavored with the principles of alchemy.
• Motive Rant: Having found Anataeus, Verrin Ravari, Head Alchemist of House Colvan, reveals that the happenings of the game were his idea, and that his plan was to take control of House Colvan, and then proceed to take over the other Houses, which he considered weak from decadence, with his alchemy talent. He even offers Anataeus the remains of House Van Tassen, in exchange for his help. However, as detailed above, Anataeus and Concordia are long gone by the time Ravari tracks down their hideout.
• Mundane Utility:
  • In contrast to the real world where alchemy never achieved the transformation of lead into gold and even today it takes a hefty amount of equipment and a degree in nuclear physics, in-universe this is a well-known and straightforward process, to the point of being passe, especially by the main character's standards. He takes the indignity of having to perform such a basic procedure (twice!) poorly.
  • More generally, alchemy is used to produce any number of useful and mundane substances — clean water, abrasives, rat poison, etc. One of the substances featured in the "Alchemy for the Home" edition of the Journal even shows the previously thought mythical element of Quintessence being used in a "Miraculous Dentifrice": in other words, toothpaste.
  • In De Re Metallica, the protagonists set out to revolutionize alchemy, perhaps even break its laws. Instead, they create a revolutionary new way of safely storing and transporting highly volatile quicksilver.
• Natural Elements: In Opus Magnum, molecules are composed of atoms. These atoms include the classical elements: Salt (the basis of all matter, is described to stabilize molecules), Air, Earth, Water, Fire and Quintessence. In addition, there are Vitae (vital force), Mors (lethal force), Quicksilver (purifies one of the "lesser" metals into the "purer" state) and the planetary metals: Lead, Tin, Iron, Copper, Silver, Gold.
• Now Do It Again, Backwards: Two puzzles from "Production Alchemy" require a complex molecule be disassembled in one compartment, transferred to a second compartment one atom at a time, and then reassembled in the same configuration. One is a method for alchemically distilling liquor while the other is an attempt to create aether through repeated synthesis and decomposition of a substance. Amusingly, both puzzle descriptions lampshade how worthless both processes are: the liquor manufacturer insists its disassembly then reassembly unlocks unique flavors, though the book's author is visibly skeptical, while the aether "creation" is noted to be a fool's errand only pursued by a handful of fringe alchemists who still refuse to accept that quintessence is the true "fifth element".
• Obfuscating Stupidity: Clara uses her reputation as being a bit dim to hide her behind-the-scenes activities. This even allows her to assassinate Taros at a party while avoiding any personal suspicion.
• Only Sane Man: Anataeus seems to be the only one who actually takes Colvan's aggression and later attacks with absolute seriousness, trying to make things that would actually help Van Tassen's defenses.
• Perilous Old Fool: Captain Gelt, the aging commander of House Van Tassen's soldiers, charges into the Colvan forces and dies for the honor of his House— which surrenders immediately thereafter.
• Post-End Game Content: Completing the main story unlocks Appendix levels concerning Production Alchemy, where the player has only limited space, and Journal, which has a lot of puzzles with mostly more complicated molecules to produce. Journal also gives insight to more in-game lore.
• Red and Black and Evil All Over: The colors of House Colvan are black and red with white accents. They are the power-hungry and cruel primary antagonists of the story.
• Reluctant Ruler: Clara Soria explains that, as the heir of a major house, she constantly fears for her life and has to deal with the harshness of political plots. With Anataeus and Concordia, she contemplates the idea of being a humble clothier. It is unclear whether this is a pure fantasy or if she seriously considered it.
• Revenge: House Van Tassen is taken down by House Colvan. Anataeus, Concordia (former employees of Van Tassen) and Clara (who was in love with the Van Tassen heir who got executed) plot to take down House Colvan in return. Although the protagonists don't know it, the idea to take down the house was suggested by Colvan's alchemist, Verrin Ravari. Ironically, the protagonist's revenge plan is to assassinate Taros Colvan with a kiss with poisoned lipstick, and then frame Ravari for synthesizing the lipstick.
• Ruling Family Massacre: Taros Colvan orders the Van Tassen nobles to be executed after they surrender, just to make sure they are not a threat to him in the future. In that case, it makes Concordia and Clara's intense hatred for him quite justified.
• Significant Wardrobe Shift: Anataeus and Concordia have a wardrobe shift after the fall of House Van Tassen. Anataeus still wears his original outfit, but it is notably disheveled and he no longer has his medallion. Concordia meanwhile wears a darker cloak over her dress.
• Silk Hiding Steel: Clara Soria, who is generally overlooked by her House as a pretty, but dumb thing, is actually a master planner and manipulator.
• Squick: An in-universe example. Anataeus is not... exactly thrilled when he has to make a stamina potion to help Frederik "produce" a heir for House Van Tassen.
• Time Skip: The "Production Alchemy" puzzles take place an unspecified number of years after the main story, as the "Fragrant Powders" puzzle refers to the assassination of Taros Colvan happening "many years ago".
• Unspoken Plan Guarantee: Exaggerated, as we never actually learn what Clara's plan for revenge on House Colvan was, even after it is executed and the debris settles. From the little bits of dialogue and the compounds Anataeus makes for her, it appears to involve Clara making a dazzling appearance at her first official high society event, seducing Taros Colvan, giving him the Kiss of Death with the poisonous lipstick Anataeus created for her, then pinning it on Colvan's own alchemist, Verrin Ravari. Meanwhile, Nils sneakily places timed explosives (also created by Anataeus) around the Colvan estate to go off the moment Taros dies, ensuring the downfall of his House. And while all that is happening, Anataeus invents the Universal Solvent to destroy all evidence of his involvement, leaving behind a mannequin sprayed with hallucinogens to buy time while he and Concordia skip town.
• Useless Superpowers: Anataeus is stated to be one of the most brilliant alchemists of his time, and alchemy is stated to be a very powerful science (some even say it brings total mastery over the world). And yet, Anataeus finds himself unable to protect the house Van Tassen, after which he has to hide in a decrepit abandoned shop, wanted by a military that aims to execute him. He reflects that alchemists believe far too strongly in their own abilities.
• Worthless Yellow Rocks: In De Re Metallica, Saverio claims that in reductive metallurgy, gold is no longer a "mythical endpoint" but just another metal, and that iron and copper are now effectively the most valuable metals, since they can be transmuted to any other metal with the smallest number of steps. Some of the dialogue, combined with puzzle design and the background art of his humble workshop, indicate that he possesses a sizeable amount of gold, but it doesn't seem to even occur to him to use it as anything but raw material for his alchemical work.