A book you play on
Original art direction and animation produced in house — the board is the spread of a book, and a round is the page turning over it.
Slotbook Christmas Edition
Six reels, and a harbour in the snow
The Christmas Edition is Slotbook with its Christmas season switched on. The book, the harbour behind it, the chrome and the music are all dressed for the holidays; the reels, the lines, the jackpot and the mathematics are the game's own.
About the game
The same page, turned at Christmas
Christmas sits on top of Slotbook and dresses what the player looks at: the book on the board takes its Christmas art, the pirate harbour behind it is dressed for winter, the chrome follows, and the game opens on a Christmas loop instead of its usual track.
Nothing a player bets on changes. The layout, the controls and the round are the ones in the standard game, and the figures below are Slotbook's own, from the same audit — the season is drawn on the screen, not in the mathematics.
An operator switches the season on per launch, with christmasMode=true on the game's launch, and off by leaving it out; the player has no switch for it. It is one integration either way, so Christmas can go live in December and come down in January without a new build.
The mathematics
What the game is set to pay
Derived independently of the engine, then measured against it. The audit that produced these figures is reproducible in the game's own repository.
Return to player
97.01%
Derived exactly · 29.1M spins simulated
Board
6 reels × 4 rows
20 pay lines, left to right
Risk levels
20 lines / 10 lines
Same return, different shape
Jackpot
1,000× · 2,500× · 5,000×
Three books · about 1 in 48,806 rounds · no pool
Maximum win
8,000× the stake
Mathematical ceiling, before any operator cap
Randomness
Kernel CSPRNG
Strips of 500 stops per reel
In-house audit, not a test-house certificate. Stake limits, payout caps and the opening value of a jackpot pool are set by the operator and sit outside the audited mathematics — we will walk you and your certification body through both.
Features
What Slotbook Christmas Edition brings to a lobby
What the title gives a lobby, and what it asks of the platform behind it.
Six reels, four rows, twenty lines
Lines are read left to right from the first reel, a wild carries a run, and every line shape is checked against the page it is read from before a spin is sold.
Two risk levels, one return
The bet is the total; risk decides what it is spread across. Twenty lines pays smaller and more often, ten pays rarer and larger, and the expected return does not move.
A jackpot with no pool
Three books open a chest paying 1,000×, 2,500× or 5,000× of the player's own bet. Nothing is withheld from other stakes, and no operator seed is required.
Mathematics you can check
69 checks, an exact closed-form derivation from the reel strips and 29,100,000 simulated spins, regenerated by one command in the game's own repository.
Portrait first
Laid out for a phone held upright and scaled up to desktop, with autoplay limits, a pace control and a board that never leaves a player unsure what just paid.
Game preview
A look at the game
Captured from the live build — the same one the demo above opens.
Christmas on Slotbook
Play the Christmas Edition, then talk to our team about switching the season on for your players — and when to switch it off.