Tome of Madness is a Play’n GO horror grid slot released on 27 June 2019. Rich Wilde enters a Cthulhu-inspired setting built around connected clusters, cascading symbols and a Portal that changes the grid at four charge levels. The game uses a 5x5 board rather than standard paylines and carries a maximum win of 2,000x the total bet.
Tome of Madness creates a win when 4 or more matching symbols connect horizontally or vertically. Paying symbols disappear, replacements fall into the empty spaces and the same paid game cycle continues until the grid produces no further cluster.
Tome of Madness sends every winning symbol into the Portal meter. The meter adds Special Wilds at lower thresholds, introduces the Abyss and Void removal effects, and opens the Other World Free Round after 42 winning symbols have been collected.
Tome of Madness has the following verified specifications:
Tome of Madness is listed by Wildz with 91.59% RTP, very high volatility and demo access. Currency, stake controls and mathematical settings can vary by market or operator, so the information panel inside the loaded game remains the relevant source for the current configuration.
Tome of Madness evaluates the 5x5 grid for groups of at least four identical symbols touching along an edge. A qualifying group pays according to its size, leaves the board and starts a cascade as new symbols enter from above.
Tome of Madness keeps the original wager active throughout that cascade sequence. A replacement layout can create another cluster and increase the Portal charge, but no staking pattern can determine which symbols arrive or guarantee that the sequence continues.
Tome of Madness adds 2 Special Wilds after the Portal has collected 7 winning symbols. At 14 symbols, two Special Wilds are added and a cluster involving one of them activates Abyss; at 27 symbols, the corresponding qualifying cluster activates Void.
Tome of Madness uses Abyss to clear the row or column extending from the winning Special Wild, with removed symbols contributing further charge. Void selects one regular symbol at random and removes every matching instance from the grid, but neither effect ensures that the replacements will form another win.
Tome of Madness uses the book as a Special Wild that can replace regular symbols, while Rich Wilde acts as a Multiplier Wild for high-paying symbols and applies 2x to the relevant win. Eye Marks can appear on random grid positions and open when a cluster wins across their locations.
Tome of Madness places 2 Special Wilds on the board after the marked eyes have been opened and the current wins are exhausted. These additions can support another cluster, although their positions and the following symbol drops remain controlled by the game’s random process.
Tome of Madness opens Other World when the Portal reaches 42 winning symbols. The feature awards 1 free round with 3 random Portal Effects, then adds one more effect for every three extra symbols collected above 42, up to 7 Portal Effects.
Tome of Madness displays 11 or 12 Eye Marks during Other World. Opening every eye adds Cthulhu as a Mega Wild that moves down one row after each cascade before disappearing, but reaching that state depends on clusters forming over all marked positions.
Tome of Madness has an RTP of 91.59% on the MGA build served by Wildz for this page. RTP is a theoretical long-term return calculated across a very large number of rounds, not a target for one session.
Tome of Madness can return more or less than 91.59% over any short period. Other configurations exist, so players should confirm the displayed RTP in the game information panel before choosing a stake.
Tome of Madness has a volatility rating of 10/10, classified as very high on the Wildz scale. This profile means results can be uneven and feature-rich cascades may be separated by rounds with limited or no return.
Tome of Madness volatility does not indicate when the Portal will reach a particular stage. Increasing the stake changes the money exposed on each cycle, not the random chance of clusters, Wild placements or Portal Effects.
Tome of Madness has a verified maximum exposure of 2,000x the total bet. The upper value can involve an extended combination of cascades, Portal Effects and Wild-assisted clusters rather than a fixed jackpot award.
Tome of Madness does not have a progressive jackpot. The 2,000x figure is a game limit rather than an expected result, and no previous board state makes that outcome due on a later cycle.
Tome of Madness play begins by opening the information panel, checking the active RTP and selecting a permitted stake. One paid cycle can include several cascades, with all resulting cluster wins and Portal activity settling before another wager begins.
Tome of Madness is subject to Great Britain’s online slot stake limits when supplied by a Gambling Commission licensee. Customers aged 18–24 may stake no more than £2 per game cycle, while customers aged 25 and over have a £5 maximum; personal limits can be set lower.
Yes, Tome of Madness supports compatible mobile phones and tablets as well as desktop computers. The mobile version retains the 5x5 cluster grid, cascading sequence, Portal thresholds and Other World mechanics.
Tome of Madness mobile performance can depend on the browser, device and connection. Opening the game on a smaller screen does not change its RTP, volatility or random selection of symbols and effects.
Yes, Tome of Madness has demo play enabled at Wildz. The free version uses virtual credits to demonstrate clusters, cascades, the Portal and Other World without producing withdrawable cash prizes.
Tome of Madness demo results do not predict later real-money outcomes. At a Great Britain-licensed operator, age verification is required before access to free-to-play versions of gambling games.
Tome of Madness may be supplied in Great Britain by an online casino holding the appropriate Gambling Commission permission and carrying the Play’n GO title. Customers must be at least 18 years old, complete the required checks and follow the statutory stake limits.
Tome of Madness appears in the international Wildz catalogue, while Wildz states that United Kingdom visitors are redirected to partner casinos. Players should use the Gambling Commission public register to verify the business that ultimately provides the game before depositing.
Tome of Madness real-money play in England, Scotland and Wales falls under the Gambling Commission framework. Licensed remote operators must verify customer details before gambling and must apply the current online slot stake caps.
Tome of Madness players should distinguish Great Britain from Northern Ireland, which follows a separate legal framework. The following table summarises the principal rules relevant to this slot.
| Area | United Kingdom Rule |
|---|---|
| Minimum online gambling age | 18+ |
| Main regulator | Gambling Commission |
| Online casino licensing | Operators serving Great Britain must hold the appropriate Gambling Commission permission |
| Age and identity checks | Name, address and date of birth must be verified before gambling |
| Maximum online slot stake, ages 18–24 | £2 per game cycle, in force since 21 May 2025 |
| Maximum online slot stake, ages 25+ | £5 per game cycle, in force since 9 April 2025 |
| Free demo access at licensed operators | Age verification is required before access |
| Wildz status for UK visitors | Wildz states that UK visitors are redirected to partner casinos |
Tome of Madness was developed and released by Play'n GO.
Like all online slots, Tome of Madness is a game of chance, there are no tips or tricks to winning.
Wildz provides online entertainment that puts fair play first, on a safe and secure platform that practices Responsible Gaming principles.
Min/Max Bet:
€
0.10 –
100.00
Volatility:
High
(10/10)
Platform:
Desktop & Mobile
Developer:
Play'N Go
Game Type:
Slots