7/10
Release Date: 20th August 2026
BGaming isn’t reinventing the “Book Of” wheel here, it’s polishing it. Book of Hidden Tombs drops you in front of an ancient temple standing against a star-speckled sky, torches flickering beside the reels, gods watching from the shadows. It’s the same Egyptian-mythology playbook the genre has run since Book of Dead, but BGaming leans into jewel-tone symbol design and an atmospheric soundtrack that gives it its own identity rather than feeling like a reskin.
Where it actually breaks from the template is in the risk-reward layer sitting on top of the classic formula. Instead of one flavor of free spins, you’re working toward two: a standard round anchored by a Golden Expanding symbol, and a Super Free Spins mode built around a Progressive Multiplier that climbs as high as ×512. That’s the twist that separates it from the dozens of other Book Of clones, the multiplier engine, not the theme.

The math model sits at a 97.00% RTP, on the generous side for the genre, paired with High volatility and a hit rate of roughly 1 in 4.1 spins. That combination usually plays like a game that pays often enough in small amounts to keep the reels turning, while the real money sits behind the bonus rounds.
The Book symbol does double duty as both Scatter and Wild, substituting for any paying symbol in a winning combination and triggering Free Spins once 3 or more land on the reels. It’s the standard Book Of engine, but BGaming stacks a progressive multiplier system on top that gives Super Free Spins a genuinely different risk profile from the base Free Spins round. Max win is capped at ×10,000 the stake, which at the site’s listed €250,000 max win ceiling tells you the bet range this was modeled around.
A slot cannot be truly judged by just 100 spins — a game’s RTP is calculated across billions of spins, and no short session can tell the complete story. We know that. That’s why we play well beyond 100 spins before forming any opinion on a game.
But the 100 Spins Experience is something specific — a dedicated documented window within that session designed to give you a clear, honest snapshot of the game.
Learn More About 100 Spins Experience.
The engine behind Super Free Spins. It starts at ×1. Every spin that ends without a win doubles it. The moment a win lands, that multiplier gets applied to the win and then resets back to ×1. It’s a build-up-and-release system, the longer a dry streak runs, the bigger the eventual payout gets multiplied by, up to a ceiling of ×512.
The Book symbol is both Scatter and Wild simultaneously. It substitutes into any winning combination and, on landing 3 or more anywhere on the reels, triggers the Free Spins round.
1. Chance ×2: adds +1.00 to a 2.00 bet, doubling the chance of triggering Free Spins naturally, effectively a 1.5x stake per spin while active.
2. Buy Free Spins: 100x your current bet, gets you 10 Free Spins with a single Expanding symbol.
3. Buy Super Free Spins: 200x your current bet, gets you 10 Free Spins with an Expanding symbol and the progressive multiplier (up to ×512), which is the version that can actually reach the ×10,000 max win.
Book of Hidden Tombs sticks to an old-school setup, a 5-reel grid with 10 fixed paylines, which is the kind of structure slots were using back in 2017, not anything new for 2026. And if you take away Super Free Spins, the regular Free Spins round is nothing special either, just one expanding symbol and a basic retrigger, pretty much the same thing you’d find in BGaming’s own Book of Kemet or countless other Book Of-style slots. There’s no cluster wins, no “ways to win,” nothing that really shakes up the format, the Egyptian gods-and-scarabs look is just a new coat of paint on a familiar game. And because the base game only hits about 1 in every 4 spins and is high volatility, it can feel pretty dry and slow between wins, which is exactly why the Buy Bonus option exists, so players don’t have to wait around for the good stuff.
What actually makes this game worth playing is the twist BGaming added to the bonus round, not the game itself. By splitting the bonus into two versions, a “safer” Free Spins and a bigger, riskier Super Free Spins, players get to choose their own risk level, which most Book Of-style slots don’t offer. And the multiplier in Super Free Spins is genuinely clever, it doubles every time you don’t win, and resets when you do, so unlike most slots, you’re actually hoping for a losing streak, because that’s what builds your prize up to as much as ×512. That’s a fun, different feeling most similar games don’t give you.
Add in a 97% RTP, which is better than similar games like Book of Tombs (95.4%), and the honest takeaway is: this isn’t a groundbreaking game, but it is a well-made one. It’s a safe, reliable release from BGaming, and pretty much all of its appeal comes down to one thing, actually getting into that Super Free Spins round, whether you land it naturally or just buy your way in.
Book Of Hidden Tombs by BGaming is available at most Canadian-friendly online casinos with CAD supported at most platforms.
RTP check: This slot comes with a RTP versions 97% . Always confirm which version your casino runs before depositing real CAD, the difference is significant on an extreme volatility game.
Ontario players: Verify availability at an iGaming Ontario licensed casino before playing.
Feature buy: Availability may vary by casino in Canada, confirm before depositing.
Browse more slots available to Canadian players
Book of Hidden Tombs has a 97.00% RTP, above the Book Of genre average of roughly 95-96%.
Buy Free Spins costs 100x your bet, and Buy Super Free Spins costs 200x your bet. Chance ×2 adds roughly 0.5x your bet per spin to double your natural bonus odds.
The maximum win is ×10,000 your stake, reachable through the Progressive Multiplier in the Super Free Spins round, which climbs as high as ×512.
It starts at ×1 and doubles every spin that doesn’t produce a win. The moment you win, the multiplier applies to that win and resets to ×1, capped at ×512.
Yes, it’s rated High volatility with a hit frequency of roughly 1 in 4.23 spins, meaning long dry stretches punctuated by bigger wins, especially through Super Free Spins.
My name is Manish, and I’ve spent the last 6+ years working at the heart of the iGaming industry, not only as a reviewer, but as a developer building slot clients for some of the industry’s top providers. Read More→