Book of King Arthur

Book of King Arthur is a medieval-adventure slot from Microgaming partner Just For The Win, centred on King Arthur and the Knights of the Round Table. The 5-reel, 10-payline structure is conventional, but the standout mechanic is the Boost feature: it powers up wild symbols, making them more potent during free spins and increasing their frequency. The Round Table itself functions as a bonus wheel—when you trigger free spins, the table spins to determine which symbol will expand during the round, adding strategic variation to bonus play.

The 96.10% RTP is premium tier, and the 30.80% hit frequency is notably generous—one of the better hit rates in high-volatility slots. This means wins land frequently enough to sustain engagement despite the high volatility floor. The 5000× max win is a solid ceiling and achievable through expanding-symbol clusters during free spins, rather than requiring an astronomically rare alignment. High volatility is cushioned by the frequent hits, making this slot more approachable than typical high-volatility titles.

Visually, the game leans into a classic fantasy aesthetic with a medieval-castle setting. The brick barrel-reels and Round Table wheel add character without veering into visual overload. The Boost feature, whilst mechanically straightforward, offers enough variation to keep bonus rounds interesting across multiple plays. This is a well-balanced high-volatility slot that doesn't sacrifice hit frequency for ceiling height—a smart design choice that appeals to both grinders and chasers.