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Book of Ultimate Infinity

You’ll have to go to infinity and beyond to discover the riches of Ancient Egypt. Follow the treasure map to find the precious Gold Book, and you’ll be one step closer to winning the game’s max potential of 5,000x your stake.
rating Rating
rating Provider
SG Digital
rating RTP
rating Paylines
rating Volatility
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1044 Games
100% up to €300 + 25 Free Spins on Book of Dead
What does John have to say?

Yes, it is just another slot to add to the ‘Book of’ games collections, but SG managed to make it different enough to outshine its competition in this category. At least until the next better release comes along.


Leanna Madden

100% up to €300 + 25 Free Spins on Book of Dead

Visit Site See full T&Cs for more detail. 18+ Please Play Responsibly.
  • Thumbs-Up Infinity reels with progressive multipliers
  • Thumbs-Up 5,000x your stake potential
  • Thumbs-Up Free spins can be retriggered
  • Thumbs-Down Low-paying symbols as special symbols

Book of Ultimate Infinity Review

Here’s something you’ve never seen before in the ‘Book of’ slot series. We’re talking Infinity Reels by SG Digital and Reel 7. They are here to add an extra dimension to this category of slots that have been done and re-done in so many ways using different mechanics.

As you start your game with a 3×4 reel configuration, you build on it to increase the grid while activating bonus rounds to gain potential wins. While the game’s theme is nothing innovative, it’s the certain little twists in gameplay that make this release rather appealing.

SLOT FEATURES Infinity Reels with Increasing Multipliers, Free Spins, Expanding Symbols
RELEASE DATE 5,000x Your Stake
SLOT TYPE Video Slot
THEME Ancient Egypt
REELS, ROWS, PAYLINES 3-Infinite Reels, 4 Rows, Infinite Paylines
BET LEVELS £0.20 – £50
MAXIMUM WIN 5,000x Your Stake

Book of Ultimate Infinity slot screenshot

Book of Ultimate Infinity Bonus Features

Before any bonus features can be triggered in Book of Ultimate Infinity, you’ll have to crack the Infinity Reels mechanics first. The idea here is to land a minimum of 3 symbols of a kind on reels 1, 2 and 3 to gain an extra reel on your 3×4 reel layout. More reels are added as identical symbols hit the respective reels.

Essentially, you’ll have to add as many extra reels to your existing grid as are required to find the famous Gold Book symbol, the key to the free spins round. As well as adding extra reels, you’ll also benefit from progressive multipliers which start at 2x and then increase by 1x for each successive reel added.


The wild symbol in Book of Ultimate Infinity is quite unimaginative for an Egyptian-themed slot, but it does come in handy when building winning combinations. It will replace all paying symbols except scatters and special expanding symbols.


Scatters take the shape of a Gold Book symbol and activate the free spins round but the activation process here is not in any way conventional. For starters, the book is hidden on a random position between reels 6-15, so you’ll have to expand the initial 3-reel grid setup into a 6-reel grid at the least to find it.

An extra reel is added on every winning spin, and there’s a tiny reel counter to the grid’s left, indicating how many reels you’ve got left to add for the book to be revealed. When you succeed, the free spins round kicks in.

There’s also a map you can follow to see where the book is located. Though at times it can be just too frustrating to look at when you’re close to achieving the needed reel and it doesn’t happen.

Free Spins

When you reach the reel containing the golden book scatter, you’ll have 10 free spins to start the round. From there on, the bonus feature works just like in any other ‘Book of’ slot but with a twist.

During the free spins round, the magical book opens up and chooses a random symbol for turning it into a special expanding symbol. Sounds pretty standard but here comes the twist. Land the book scatter or the special expanding symbol on the rightmost reel, and you’ll add an extra reel to your active play grid.

Also, if you land the special expanding symbol on 2 or more reels, it will expand to fill the respective reel and pay once per symbol, regardless of them being in consecutive order.

It’s possible to retrigger an extra 10 free spins during the bonus round in the same manner as is done in the base game. In which case, the already chosen special symbol is carried over.

Book of Ultimate Infinity Jackpot

The game’s 5,000x your stake max potential doesn’t come from an official jackpot, but it’s a decent enough win. In some cases, this is even better than some fixed jackpots so we’ve no complaints here.

RTP and Volatility

We have no complaints in the key stats department either. At 96.50%, the RTP is nice and high, and the same can be said about the volatility. It’s set to a high rate to help you maximise your wins, so don’t expect any relaxed gameplay here.

Where to Play Book of Ultimate Infinity

Fans of the Infinity Reels slots will be flocking to online casinos to play the Book of Ultimate Infinity slot, but don’t rush, the game is not going anywhere fast. It’s more important to find a secure online casino with the developer’s games featured, like Party Casino or Casimba, for example.

Book of Ultimate Infinity on Mobile

Can you add as many extra reels to your existing playfield on a tiny screen as you can on your desktop? Sure you can, because the slot is fully optimised for Android and iOS mobile use. It adapts to any smaller screen instantly without delay, be it a mobile phone or a tablet.

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Leanna Madden is an expert in online slots, specializing in analyzing game providers and evaluating the quality and variety of slot games. With her extensive knowledge, she guides players to the best slot options, including high RTP slots and those with exciting bonus features. Leanna's insights help players make informed decisions and enjoy rewarding slot experiences at online casinos.

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