Book of Xerxes - Diamond Treasures

Book of Xerxes – Diamond Treasures takes Apparat Gaming's existing Book of Xerxes concept and bolts on an optional side-game layer, giving players a choice between the traditional expanding-symbol experience and a higher-stakes, prize-draw-enhanced version of the same underlying slot. It's a smart way of offering two distinct risk profiles within a single game rather than forcing every player down the same path.

The setting is a fantasy-tinged take on Ancient Egypt rather than a strictly historical one — golden books, enchanted relics and arcane symbols fill the reels, leaning into mystery and magic over archaeological realism. The presentation is clean and well-animated, with dramatic effects accompanying both the Bonus Symbol expansions and the Diamond Treasures prize draws, giving the game a slightly more theatrical feel than a typical book slot.

Structurally, it's the standard 5-reel, 3-row grid with 10 fixed paylines, and the book symbol works as a combined wild and scatter — substituting for regular symbols while also triggering Free Games when three or more appear anywhere on the reels. Landing 3, 4 or 5 scatters awards 10 Free Games, during which a Bonus Symbol is selected from the game's nine regular symbols and expands across full reels whenever it lands, in the classic book-slot style.

The Diamond Treasures side game is the genuine point of difference here: activated for an additional bet, it introduces a random prize-draw mechanic that runs alongside the base game, giving players an extra route to rewards beyond the standard paytable and free spins structure. It's an opt-in system, so cautious players can simply ignore it and play the core game as a conventional book slot.

On the numbers, Book of Xerxes – Diamond Treasures carries a 96.11% RTP, a solid and competitive figure, alongside high volatility and a genuinely substantial maximum win potential of 25,000x the stake — well above the genre's traditional 5,000x ceiling, and a clear sign that the Diamond Treasures layer meaningfully raises the game's overall potential. Stakes run from a low 0.10 up to 10 per spin, keeping the entry point accessible even with the added side-bet option available.

For players who want the reassurance of a classic book-slot foundation with the option to chase considerably bigger rewards through an optional side game, Book of Xerxes – Diamond Treasures offers genuine flexibility alongside a well-above-average win ceiling.

Fancy testing the Diamond Treasures prize draw for yourself? Try Book of Xerxes – Diamond Treasures for free in demo mode at johnessyslots, or opt into the side game for real with a shot at that 25,000x ceiling.