Book of Hidden Tombs Slot Review — BGaming

This review is based on pre-release promotional material provided by BGaming. Details may change before or at launch on 20th August 2026. A full review will follow once the game is live.

Are you brave enough to spin?

BGaming enters the crowded Book Of space with Book of Hidden Tombs, and the studio is smart enough to know that doing so requires a genuine twist rather than a straight reskin. The twist here is Super Free Spins — a second, distinct bonus pathway triggered by Golden Scatter symbols that layers a progressive multiplier on top of the standard Book Of expanding symbol mechanic. The multiplier doubles on every non-winning spin and resets on every win, climbing up to a maximum of 512x and creating a tension between wanting wins and wanting the multiplier to keep building. At high volatility, an RTP of 97.00%, and a 10,000x max multiplier, Book of Hidden Tombs has the ceiling to compete at the top end of the Book Of genre.

Core Gameplay

Book of Hidden Tombs runs on a ten-payline grid set against a torchlit ancient Egyptian temple backdrop. The Book symbol functions as both Scatter and Wild — substituting for all paying symbols in winning combinations and triggering Free Spins when three or more appear anywhere on the reels. Two types of Book scatter exist: standard Books and Golden Books, with the latter specifically unlocking the Super Free Spins pathway. The base game otherwise plays as a standard Egyptian slot with jewel-tone symbols and atmospheric presentation.

Bonus Features

Free Spins trigger on three or more standard Book scatters and operate on the classic Book Of template. Before the round begins, one symbol is randomly selected as the Golden Expanding symbol for that session. When two or three instances of the Golden symbol appear during the feature they expand to cover their entire reel, paying across all ten paylines regardless of their position — the familiar Book Of mechanic. Landing three or more Books during the feature retriggers with ten additional spins. The Golden Expanding symbol selection is made fresh each time the feature triggers.

Super Free Spins activate on three or more Golden Scatter symbols and bring the feature's key innovation: a progressive multiplier starting at 1x that doubles on every spin ending without a win — climbing to 2x, 4x, 8x, 16x, and so on up to a maximum of 512x. When a win occurs the current multiplier is applied to that win and then resets to 1x, creating the central tension of the feature. A long sequence of non-winning spins builds a substantial multiplier, but the next win resets it — and players must decide whether the resetting win was worth ending the climb. The standard expanding symbol mechanic from Free Spins also applies within Super Free Spins, combining the expanding symbol coverage with the progressive multiplier for the feature's peak scenarios.

Feature Access & Buy Options

Both Free Spins and Super Free Spins are directly purchasable, with pricing adjusting automatically to the selected bet. Chance x2 raises the stake slightly to double the natural scatter trigger probability, available only when Buy Bonus is inactive.

Next Steps for This Review

At launch the review will be updated with the full grid layout, how the progressive multiplier distribution plays across a standard Super Free Spins run in practice, whether the Golden Expanding symbol selection in Super Free Spins differs from standard Free Spins, and the specific buy prices for each feature tier. A final score and full gameplay analysis will follow once hands-on time with the game is available.

Full gameplay analysis and a final score will follow the launch.