Tome of Madness

Tome of Madness slot — key mechanics

The main goal of the game is to fill a special progress bar, which is designed as a medallion (Portal Meter). For every winning combination, the player accumulates points. If no more wins occur, all accumulated points are lost.

During the round, a special cell called the Eye Mark appears on the grid. If one of the winning symbols lands in this cell, two Wild symbols will appear on the grid.

As the medallion fills up, the player activates additional mechanics that can significantly increase the potential payout.

Tome of madness — bonus mechanics

When the portal is activated, several additional mechanics can be triggered. Let’s take a look at what they actually do.

Abyss Portal Effect — 2 Wild symbols appear on the grid. If a winning combination includes one of these symbols, the entire row or column containing it is removed from the grid. All removed symbols are added to the Portal Meter.

Void Portal Effect — 2 Wild symbols appear. Then, the game selects one random symbol and removes all of its copies from the grid.

Other World Free — a bonus game with its own set of mechanics, which we’ll cover in the next section.

Also, it’s worth noting that the game uses the Cascading Reels mechanic. This means that when symbols disappear from the grid, new ones fall into place, potentially creating new winning combinations.

Free rounds gameplay

When the player fully fills the medallion, the “Other World Free” feature is activated. The player receives a free round with one of the following additional effects:

• The appearance of 4 Wild symbols

• The appearance of 4 Wild symbols and activation of the Abyss Portal Effect, if a Wild is part of a winning combination

• Same as the previous, but instead the Void Portal Effect is triggered

Each winning combination can trigger additional effects, and these effects will accumulate, but the total number of effects cannot exceed 7.

Mega wild symbol

You can also trigger the Mega Wild symbol. During the bonus game in the Tome of Madness, 11 to 12 Eye Mark cells appear on the grid. If the player manages to land a winning combination on each of these Eye Marks, a Mega Wild symbol in the form of Cthulhu will appear on the grid.

Conclusion

The recognizable character Rich Wilde, the carefully crafted visuals inspired by Lovecraftian horror, and the intricate bonus game mechanics — these are the signature traits of Play’n GO’s approach that make us love their games.

According to the platform Stake, the game consistently has 50–70 active players, even outside of peak hours (on Stake, you can actually see the current number of people playing), despite the fact that the slot is already 6 years old at the time of writing this review! The game remains especially popular in regions like the United Kingdom, where it's available through licensed online casinos regulated by the UKGC.

Rich Wilde and the Tome of Madness in the UK is a perfect fit for fans of high-volatility slots. If the player is willing to endure long stretches without major wins, they will be rewarded with a bonus round and the Mega Wild mechanic.