Book of Hidden Tombs - Demo & Slot Review

Book of Hidden Tombs uses 5 reels, 3 rows and 10 fixed paylines. Wins form from left to right on consecutive reels. The RTP is a notably high 97.00%, volatility is high, and the hit frequency is around 24.39%. Bets range from 0.10 to 25, while the maximum win reaches 10,000x the bet.

The main feature is built around the Book, which works as both Wild and Scatter. Landing 3 or more triggers 10 Free Spins with a randomly selected Golden Expanding symbol. If the Collector activates before the bonus, those Scatters turn golden and the game upgrades into Super Free Spins instead.

Basics

The base game is deliberately old-school. Regular symbols form wins across the 10 paylines, while the Book Scatter-Wild substitutes for normal symbols and also acts as the bonus trigger. 3 or more Books anywhere on the reels start the Free Spins round.

There is not much else trying to steal attention during regular spins, which will either feel pleasantly simple or a little too familiar depending on how many Egyptian Book slots you have already dug through.

Free Spins

The standard bonus always begins with 10 Free Spins. Before the round starts, one regular symbol is randomly chosen as the Golden Expanding symbol. Depending on which symbol is selected, landing 2 or 3 copies makes it expand across the full reel and pays on all 10 paylines regardless of the symbols' original positions.

Landing another 3 or more Books during the bonus retriggers the feature with 10 additional Free Spins. It is the classic Book formula almost exactly where you would expect to find it, and the chosen expanding symbol can make a pretty big difference to how promising the round feels.

Super Free Spins

Before Free Spins begin, a Collector above the reels can activate and turn the triggering Books into Golden Scatters. When that happens, the normal round is upgraded to Super Free Spins.

The expanding-symbol mechanics remain the same, but Super Free Spins add a progressive multiplier starting at 1x. Every spin without a win doubles it through 2x, 4x, 8x and so on, up to a maximum 512x. When a win finally lands, the current multiplier applies and then resets.

It is a simple twist, but easily the most interesting part of the game. A few dead spins suddenly stop feeling completely useless when they are busy loading a much nastier multiplier for whatever comes next.

Feature Buy

Where available, the Buy Bonus menu gives direct access to both bonus rounds. Regular Free Spins cost 100x the bet, while Super Free Spins cost 200x. Both start with 10 spins.

There is also Chance x2, which slightly increases the bet and doubles the probability of triggering Free Spins naturally. The feature cannot be active at the same time as Buy Bonus.