Book of Dead has been one of the most consistently popular online slots since Play'n GO released it in 2016. Rich Wilde, the studio's globe-trotting archaeologist, stars in this Egyptian-themed adventure across five reels and ten paylines. It is frequently cited alongside Book of Ra as the title that defined the genre of "book slots" that now dominates the online casino landscape.

The setup is classic: five reels, three rows, ten fixed paylines. High card symbols fill the lower end of the pay table, while Rich Wilde himself alongside the Scarab, Anubis, and Ra offer the bigger payouts. The Book of Dead acts simultaneously as the wild and the scatter, substituting for all other symbols and triggering the bonus round when three or more land anywhere on the reels.

The free spins feature is where the game earns its reputation. Landing three or more books awards ten free spins, and before the round begins, one symbol is randomly selected as the special expanding symbol. During the free spins, if that symbol appears anywhere on any reel, it expands to fill the entire reel and pays across all positions — not just aligned paylines. If the selected symbol happens to be Rich Wilde, a full board of expanding wilds is possible, which pushes the maximum win to 5,000 times the stake.

The volatility is high, meaning dead spins in the base game are frequent. Players hunting the bonus round may experience long runs before it triggers, and not every bonus round delivers a meaningful result. However, when the stars align — particularly with a premium special symbol and multiple expanding instances — Book of Dead justifies every idle spin that preceded it. Its longevity in the most-played charts across Europe, particularly in Germany and the UK, speaks to its enduring appeal.