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Modules and the manual

Bomb Manual Glossary: Seven Terms Every Expert Uses

By Bomb AppétitPublished October 20, 2026

The bomb manual glossary sits on the last page of the Bomb Appétit manual and defines seven terms: Defuser, Expert, module, needy module, strike, edgework and rule seed. Each gets one sentence. Together they describe who does what, what is on the bomb, what a mistake costs, and which manual matches which bomb.

Why the bomb manual glossary has only seven entries

The bomb manual glossary is short because every module page explains its own words in its opening paragraph. A glyph, a stage or a strip color is defined where it is used. The glossary keeps only the words that appear across many pages and that a module page assumes you already know.

That design has a practical side. A first-time Expert does not need to study a word list before the round. They need the handful of ideas the whole manual leans on, then the page for whatever the Defuser is looking at. Seven terms fit on one screen, can be read aloud in under a minute, and settle most arguments a new group has in its first round.

Here are the seven entries, with the manual's wording, an example of how each sounds at the table, and the page where the term does the most work. The example sentences are invented.

Term The manual's definition Said at the table (example) Where it matters most
Defuser The one player who can see and touch the bomb. "Defuser, what's on the panel at the top left?" The opening page's advice on asking
Expert Everyone holding this manual. Experts never see the bomb. "Two Experts: you take Wires to Recall, I'll take the rest." The opening page, on splitting the pages
Module One puzzle panel on the bomb. Solve every regular module to defuse it. "That's four modules done, two to go." Every one of the eleven regular pages
Needy module A module that cannot be solved. It wakes up now and then and must be kept happy. "The vent's awake again, read me the question." Pressure Vent, Discharge Lever, Dial Alignment
Strike A mistake. Each strike speeds up the countdown. The last allowed strike sets the bomb off. "That's one strike, so Color Echo uses the next column." Color Echo, whose column depends on strikes
Edgework The labels on the bomb's casing: serial number, batteries, indicators and ports. "Read me the edgework before we touch anything." Appendix: edgework
Rule seed The number of this manual. A bomb only works with the manual that has its rule seed. "What seed is the bomb on? Mine says 1." The top of the opening page

On screen, the quickest way to the glossary is the filter: press slash, type glo, press Enter. The guide to bomb manual shortcuts covers the rest of the keys. You can read the real entries now in the standard manual, seed 1.

Defuser and Expert: the glossary's two roles

The glossary's two roles split sight from knowledge. The Defuser is the only player who can see and touch the bomb. The Experts are everyone holding the manual, and they never see the bomb. Each bomb has exactly one Defuser and one to four Experts, so a group is two to five people.

The definitions are strict for a reason. The game only works when the Defuser cannot read the rules and the Experts cannot see the panels, because the round is the conversation that bridges the gap. A Defuser who peeks at the manual, or an Expert who leans over to look at the screen, removes the reason to talk.

In an online room the split is enforced. Roles lock while the bomb is armed. The Experts' screens show only the timer, the strike count and how many modules are solved, never the panels. At a shared table, the group has to enforce it themselves, usually by turning the bomb screen away from the Experts.

The Expert definition says "everyone holding this manual", which is worth reading literally. Two Experts can hold the same manual on two devices, or one printout between them. Either way they are both Experts, and the manual's opening page tells them to split the pages so they never search for the same thing.

Module and needy module: what the glossary keeps apart

The glossary separates a module, which can be solved, from a needy module, which cannot. A module is one puzzle panel, and solving every regular module defuses the bomb. A needy module wakes from time to time, needs attention, and goes back to sleep. It never counts toward the defusal and never finishes.

There are eleven regular modules and three needy ones. The regular ones run from Wires and Big Button through to Labyrinth and Passcode. The needy ones are Pressure Vent, Discharge Lever and Dial Alignment. On each manual page, a small label above the heading says "Module" or "Needy module", which is the fastest way to tell which kind you are reading.

The difference changes how a group plans. A regular module can be worked to the end and forgotten. A needy module has to be revisited for the rest of the round, so someone keeps an ear on it. And the bomb is defused the moment the last regular module is solved, whatever the needy modules are doing at that instant.

The phrase "must be kept happy" in the glossary is doing real work. Each needy module has its own idea of happy: a correct yes or no, a dial pointing the right way, a meter that never fills. When one is not kept happy, the bomb takes a strike. The schedule each one keeps, from its first wake to its naps, is laid out in the needy module timer guide.

What does the glossary mean by a strike?

In the glossary, a strike is any mistake the bomb counts. Each strike makes the countdown run faster, and the last allowed strike sets the bomb off. A wrong cut, a wrong press, a wrong answer to a needy module, or letting a needy module's window run out can all cause one.

The glossary does not say how many strikes are allowed, because that depends on the mission. Most missions allow three, so the third strike explodes the bomb. Some later missions allow fewer. The details on how much faster the clock runs after each one are in strikes, the timer and the speed-up after a mistake.

A strike also changes some rules mid-module, which is why the term belongs in the glossary and not only on the module pages. Color Echo picks its answer column by the number of strikes on the bomb right now. Recall goes back to stage one with new numbers after a wrong press. Several module pages say what a strike does to that module, and the post on reading a manual page in puzzle games with instructions shows where on the page to look.

Edgework and rule seed in the glossary

The glossary defines edgework and rule seed side by side because both are facts about the whole bomb rather than one module. Edgework is the labels on the casing: serial number, batteries, indicators and ports. The rule seed is the manual's own number. A bomb only works with the manual whose rule seed it shares.

Edgework is something the Defuser reads to the Experts. The manual's edgework appendix asks for all of it at the start of the round, written down, because many module pages refer to it. The appendix also explains the details the glossary skips, such as counting batteries rather than holders, and the vowels A, E and U being the only ones a serial number can contain.

The rule seed is something both sides check before the round starts. The manual prints its seed at the top of the first page, and the Defuser's game screen names the manual number its bomb uses. If they differ, every answer the Experts give comes from the wrong rules. Seeds run from 1 to 999,999, and seed 1 is the standard manual. How one number produces every page is set out in how a rule seed generates every manual page.

The pairing is useful to remember. Edgework is the bomb's fixed facts for this round. The rule seed is the manual's fixed facts for this round. Get both right in the first minute and the rest of the round only needs the module pages.

Which glossary terms do new Experts mix up?

New Experts can blur four pairs of ideas in a first round: a module with a needy module, a strike with an explosion, edgework with the words printed on a module, and the rule seed with the room code. Each confusion leads to a specific wrong move, so it helps to name them before playing.

Module and needy module. A new Expert hears "five modules left" and counts the needy ones in. They never get solved, so the count never reaches zero. Count only regular modules toward the defusal.

Strike and explosion. "We got a strike" is not "we lost". The bomb only goes off on the last allowed strike, or when the timer reaches zero. One strike means the clock is faster and some rules may have shifted, not that the round is over.

Edgework and module text. The Big Button carries a printed word, and Passcode has letter wheels. Neither is edgework. Edgework lives only on the casing. If a rule asks about an indicator label, it means the three-letter label on the casing, not anything written on a panel.

Rule seed and room code. An online room has a five-letter code that lets players join. That code is not the rule seed. The seed is a number, and it is what the manual and bomb must share. Joining the right room with the wrong manual open still gives wrong answers.

The glossary mistake: treating a rule seed as a difficulty level

A costly glossary mistake is reading a rule seed as a difficulty setting, as if seed 500 were harder than seed 1. It is not. A new seed changes the contents of the rules, such as which line says what and which table cell holds which answer. It does not make the bomb harder.

What a seed changes: the lines in the Wires and Big Button lists, the cells in every lookup table, the Passcode words, the Labyrinth mazes, the glyph columns, the needy module answers. What it does not change: which modules exist, how each page is laid out, the time limit, the number of modules on the bomb, the number of strikes allowed. Those come from the mission or the freeplay settings.

Every seed's rules are generated and checked so that each bomb has exactly one correct action at each step, so no seed is unfair. A new seed only feels harder because nobody has seen it, and that is its purpose: an Expert cannot answer from memory. The final mission in the game uses a seed other than 1 for exactly that reason, describing itself as a manual nobody has seen before.

If a group wants a harder round, pick a mission with more modules, less time or fewer strikes. If it wants a fresh round, change the seed. Those are two different dials. For a tour of how the pages themselves are arranged, which stays the same whatever the seed, see how the bomb game manual is organized.

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