King Of Kings

King of Kings is Relax Gaming's take on the Book of Ra archetype: a 5-reel, 3-row Egyptian-themed slot with a single expanding symbol mechanic and a high-volatility free spins bonus. At 5 paylines—unusual in modern terms—it leans into the classic slot formula rather than contemporary cluster-pays or Megaways.

The hook is straightforward. Land just 2 scatters during the base game and you trigger a re-spins feature where one symbol expands and locks, giving you fresh spins to build wins around that expanded symbol. Hit 3+ scatters for the main free spins bonus. Once in free spins, one symbol is randomly chosen to expand across all positions on its reels, creating the outsized wins the game is designed to deliver. With expanding symbols acting as wildcards, the 5,000× theoretical max is feasible—you just need the right symbol, enough free spins, and a bit of luck.

Visually, it's pure Egypt: gold temples, blue skies, pharaohs, gems. The aesthetic is clean and recognizable. Bet range is €0.10–€50, scaling to most bankrolls. High volatility means you'll chase the free spins; base-game payouts are sparse. The 5 paylines feel minimal, but the re-spins mechanic bridges the gap between base and bonus. Relax Gaming's design philosophy is "keep it simple," and King of Kings embodies that.