The freeplay rule seed is yours: any whole number from 1 to 999,999, typed into the setup before the bomb is dealt. A mission's seed is fixed by the mission and cannot be changed. That trade is the whole difference. Freeplay gives you any manual but no leaderboard; missions give you a board but a set manual.
What the freeplay rule seed field accepts
The freeplay setup has a field labelled "Manual (rule seed)". It takes a whole number from 1 to 999,999 and starts at 1. Under it, the page explains that 1 is the standard manual and any other number is a whole new manual. Whatever you type, the field keeps the value inside that range.
The field corrects input as you type. A number above 999,999 is pulled down to 999,999. Zero, a negative number or an empty box becomes 1. A decimal is rounded down. So the field can never hold a seed the manual cannot open, but it can hold a different seed from the one you intended.
The seed sits beside the other freeplay choices: how many regular modules, how many needy modules from zero to three, the time limit, the strike limit and which regular modules the bomb may draw from. The seed does not interact with any of them. Changing the module count does not change the manual, and changing the manual does not change the bomb's size.
Two buttons follow the setup. "Deal me a bomb" creates the bomb on this device, and "Open manual" followed by the seed opens the matching manual. The second button is the quickest way to hand the right manual to an Expert. It always shows the number the bomb will use.
Freeplay settings, including the seed, travel in the bomb's address. A setup can be bookmarked or shared as a link, and opening that link rebuilds the same settings. The bomb itself is still dealt fresh, because the bomb seed is added by the server when the bomb is created.
In an online room, the host sees the same fields after choosing "Freeplay (custom)" from the room's setup. For the click-by-click steps in each place, see how to change the rule seed in three places.
Mission seeds: nineteen on seed 1 and one on seed 2026
Every mission has its own rule seed, and nobody can change it. Nineteen of the twenty missions use seed 1, the standard manual. The final mission, Bomb Appétit, uses seed 2026. The missions page prints each one's manual number at the end of its details line, and the briefing screen names it again before arming.
The missions run in four sections of five, from First bite with one module up to Double shift with fourteen modules and three needy ones. All of those sit on the standard manual. The one exception is the last mission of section four. Its blurb promises a manual nobody has seen before, and it pairs that with eleven modules, ten minutes and a single strike.
A mission fixes more than the seed. It also fixes the time limit, the strike limit, the module count, the needy count and the modules the bomb can draw from. Two early missions, First bite and Button up, fix the bomb seed too, so they deal the identical bomb every time. The rest deal a fresh bomb on each attempt from the same mission settings.
In an online room, choosing a mission sets the room's rule seed to that mission's seed. The Experts' screens then load that manual when the bomb is armed. The host has no seed field to edit while a mission is selected.
Switching back the other way has a catch. When the host moves a room from a mission to "Freeplay (custom)", the freeplay fields start again from their defaults: three modules, no needy modules, five minutes, three strikes and rule seed 1. A host who had typed a custom seed earlier, then tried a mission, has to type that seed again. Read the room's "Experts will use manual" line after every switch.
For a team picking its next step through the missions, the guide on which mission a team should attempt next lays out the climb.
Why does a freeplay rule seed have no leaderboard?
Leaderboards rank teams on the same challenge. A board in Bomb Appétit is one mission at one board epoch, and it lists signed-in players by their best verified defusal. Freeplay lets every player choose a different seed, module count and timer, so there is no common challenge to rank. The server only ranks mission defusals.
Think about what a freeplay board would have to compare. One team might set three modules on seed 1 with ten minutes. Another might set eleven modules on seed 500,000 with five. A ranking by time left would reward whoever set the easier bomb, not whoever played better.
Missions solve this by fixing everything that matters. The manual, the timer, the strikes and the module pool are the same for every team on a board. A change to a mission's time limit, strike limit, module pool or seeds has to raise its board epoch, which starts a new board and keeps the old one as an archive. Times on one board are therefore comparable.
Freeplay runs are still played on the same engine, and the bomb still behaves exactly as a mission bomb would. They are simply not ranked. That makes freeplay a good place to experiment, since a bad round costs nothing on any board.
For how the boards treat seeds more broadly, the replayability guide answers whether leaderboards use one seed or any seed.
Which should a group play tonight: a mission seed or a freeplay seed?
It depends on what the group wants from the evening. Missions suit a group that wants a goal, a ladder to climb and, if they sign in, a place on a board. Freeplay suits a group that wants to try a fresh manual, set its own difficulty, or practise a module without a timer pushing them off it.
The table compares the two modes.
| Question | Freeplay seed | Mission seed |
|---|---|---|
| Who sets the rule seed | You, or the host in a room | The mission; nobody can change it |
| Allowed range | Any whole number from 1 to 999,999 | Seed 1 for nineteen missions, seed 2026 for the last |
| Does a board rank the run | No; freeplay has no board | Yes, for signed-in players with a verified defusal |
| What else you choose | Module count, needy count, timer, strikes, pool | Nothing; the mission fixes it all |
| Example use | Example: a group that knows seed 1 tries seed 4,711 with six modules and eight minutes | Example: a pair works through section one, then attempts Rush hour |
Some honest trade-offs:
- Freeplay costs you a board. If a defusal on a fresh seed was your best ever, it will not be listed anywhere.
- Missions cost you variety. Nineteen missions share one manual, so a group playing them all will come to know seed 1 well.
- Freeplay asks for more care. Every Expert must open the right number, since there is no mission name to check against.
A mixed evening works well. Play missions on seed 1 until the group starts answering from memory, then switch to freeplay on a new seed to get everyone reading again.
If a freeplay round goes wrong in a way that feels like the rules are broken, the likeliest cause is that the manual and the bomb are on different seeds. The guide to fixing a manual that does not match the bomb walks through the signs. The background on why seeds keep a manual fair is in the games with random rules guide.
The freeplay mistake: practising on seed 1 for the seed 2026 mission
The final mission uses seed 2026, not seed 1. A team that rehearses for it in freeplay on the default seed learns the wrong pages. Freeplay starts on seed 1, so this happens whenever nobody changes the field. To practise usefully, set the freeplay rule seed to 2026 and copy the mission's shape.
The mistake is easy to make for a good reason. Every mission before the final one uses seed 1, so a team climbing the ladder has spent its whole time on that manual. When the last mission blocks them, the natural move is more practice. If that practice stays on seed 1, it trains lookups and habits that do not apply to the final mission's pages.
A closer rehearsal in freeplay:
- Open the freeplay setup on Play.
- Set "Manual (rule seed)" to 2026 and check that the button now reads "Open manual 2026".
- Set eleven regular modules, no needy modules, ten minutes and one strike.
- Leave every regular module in the pool, as the final mission does.
- Send every Expert the 2026 manual and check each header before dealing.
This copies the mission's settings, not its bomb. Each freeplay deal is still a fresh bomb, and freeplay runs are not ranked. But the manual is the same one the mission uses, so the reading practice carries over.
Some teams prefer the opposite approach and never study seed 2026 before their attempt, keeping the "manual nobody has seen before" promise intact. Both are fair. The guide to the seed 2026 mission covers what that final bomb asks of a team.