Book of King Arthur: Slot Overview

Showing there’s still mileage in the ‘book of’ formula—or at least no shortage of studios happy to revisit it—Microgaming partner Just For The Win delivers another take. This time it doesn’t creep in quietly, but charges across rolling hills on horseback and into misty, storybook forests. Book of King Arthur moves the familiar setup from the scorching sands of Ancient Egypt to the cooler, wetter realms of Ye Olde England. While both the theme and mechanics are popular, this pairing isn’t seen all that often. Like most well-built ‘book of’ slots, there aren’t any huge shocks, though the developer has included a couple of small touches to add some freshness. And Ra fans can relax: the fundamentals are the same, with free spins and special expanding symbols still taking centre stage.

A boldly regal soundtrack helps set the scene, revealing a 5-reel, 10-payline layout built in the same barrel-like shape used in the studio’s early success Deco Diamonds and its follow-up Deco Diamond Deluxe, giving the grid a more tangible, physical-slot feel. The action takes place in a Camelot hall, though the background details are minimal—mainly a red carpet and a few pillars. It’s bright and clear, making it easy to picture King Arthur and his knights carrying out heroic deeds, or at least discussing them around the round table. Visually, Book of King Arthur isn’t quite the eye-candy showcase Just For The Win often delivers, but what’s on offer is cheerful and fits the old-school-leaning theme.

Book of King Arthur runs on any device and comes with numbers that suggest it’s aimed at more hard-nosed ‘book of’ fans. With stakes from 20 p/c to $/€100 per spin, it carries a theoretical RTP of 96.1% and a highly volatile model. As with all ‘book’ titles, the biggest moments are found in free spins, though the base game keeps moving at a decent pace too. That’s helped by a relatively high hit frequency of 30.8%, so roughly one in three spins returns some kind of win. It also helps that Just For The Win has stocked the paytable with plenty of high-value symbols, which is often a giveaway in games of this style.

At the bottom end sit colourful 10-A card royals, adding to the old-school slot vibe. Above them are shield symbols, Grails, Excalibur, and King Arthur. When five premium symbols land on a payline, they award 75 to 500 times the stake. Low-value symbols require at least three matching symbols to pay, while the higher ones pay from two or more.

Book of King Arthur: Slot Features

There are two betting options: the standard setting runs from 20 p/c to $/€50 per spin, or you can pay double—40 p/c to $/€100—by switching on the Boost feature. In exchange for doubling the stake, Boost upgrades the standard wild from a 1×1 tile to a reel-filling 1×3 wild that always covers the entire reel when it appears. Wilds in any form substitute for regular symbols to help complete winning combinations.

The dragon-covered book acts as both wild and scatter, and as a scatter, 3 or more anywhere trigger 10 free spins. The books also pay 2x, 20x, or 200x the base bet when 3, 4, or 5 land anywhere on the reels. As a neat thematic alternative to page-turning, a round table spins to randomly select a special expanding symbol, which can be any symbol except the Book. During the feature, once any standard line wins have been paid, if the special symbol can form a win, it expands to cover all positions on the reels where it appears. These symbols pay all lines, from any reel, and they don’t have to be adjacent. If 3 or more book symbols land during free spins, you receive 10 additional free spins.

For anyone who’d rather bypass the base game and head straight into free spins, Book of King Arthur may include a bonus buy. The price is 80x the current bet and it guarantees at least 3 scatters on the next spin. One technical restriction applies: you can’t purchase free spins while Boost mode is active.

Book of King Arthur: Slot Verdict

If you want a ‘book of’ slot that sticks to the classic blueprint, Book of King Arthur has nothing stopping it from doing the job. The genre keeps expanding, and Just For The Win has put together one of the stronger entries. The theme may not be explored as deeply as the studio sometimes manages, but you still get a pleasing Medieval presentation with an arcade-like energy layered on top.

It would help players to know whether the Boost feature impacts RTP, especially since doubling the stake is a meaningful jump. Still, if it helps unlock Book of King Arthur’s upside, it could be a smart trade-off given the max win is 5,000 times the bet—achieved with a full screen of Arthur symbols. As that outcome is most likely during free spins, it’s useful to have the option to avoid any base-game grind by using the feature buy.

Not so long ago, a 5,000x ceiling would have placed Book of King Arthur among the top tier of ‘book’ slots for potential. But as the “bigger is better” trend continues, there are now expanding special symbol games with far larger payouts, with Book of Shadows being a strong example. Even so, if you’re after a dependable, traditional version of this style with a couple of engaging tweaks and a fresh setting, Book of King Arthur is a very safe pick.