Tome of Madness
Tome of Madness is a slot game set in a mysterious library, inspired by Lovecraftian tales. Players will find ancient books, mystical artefacts, and eerie symbols on the reels, all surrounded by a shadowy atmosphere. Detailed graphics and unusual characters give the game a distinct and curious look.
Introduction to Tome of Madness
Tome of Madness is an online slot developed by Play'n GO, featuring a unique cascading mechanic and an adventurous theme. Played on a 5x5 grid, this game offers cluster-based wins and a variety of engaging bonus features. The minimum bet available is £0.10, with a maximum wager of £5.00 per game round.
How the Game Works
Tome of Madness uses a cascading system on a 5-reel, 5-row grid. Instead of traditional paylines, wins are awarded for clusters: form a group of four or more matching symbols that are directly connected horizontally or vertically. When a winning cluster is formed, those symbols are removed, and new symbols drop into place, potentially creating new winning combinations. Cascades continue until no more wins are possible in a round.
Cluster Wins
- Four or more symbols connected horizontally or vertically form a winning cluster.
- Winning symbols are removed, allowing new symbols to fall and potentially create additional wins.
- All cluster wins in a round are combined for your total payout.
- Only the highest win for each symbol combination is paid.
Special Symbols and Eye Marks
During play, Eye Marks may appear in random grid positions. To open an Eye Mark, form a winning combination in its location. When no more wins occur, two SPECIAL WILDS are added to the grid, providing more chances for new wins and features.
The Portal and Its Effects
As you collect winning symbols, the Portal charges and unlocks various bonus features. Here's how the Portal mechanics work:
- After winning with 7 symbols, two SPECIAL WILDS are added to the grid.
- After 14 winning symbols, two more SPECIAL WILDS are added.
- If a SPECIAL WILD creates a win during this stage, the ABYSS Portal Effect is activated, which removes a row or column from the SPECIAL WILD's location. These removed symbols help further charge the Portal. If another SPECIAL WILD is removed, the effect repeats from that symbol.
- After 27 winning symbols, two more SPECIAL WILDS are added. SPECIAL WILD wins at this stage trigger the VOID Portal Effect, which selects one regular symbol type at random and removes all of those symbols from the grid.
If multiple Portal charge effects are earned before the earlier effects are triggered, only the most recent effect is awarded.
Other World Free Round
The Other World Free Round is triggered by collecting 42 winning symbols in a single round. You receive one free round, enhanced with three random Portal Effects. If you continue to charge the Portal beyond 42 winning symbols, an additional Portal Effect is added for every three extra winning symbols, up to a maximum of seven effects.
During this special round, a Portal Effect is activated whenever no more wins occur, intensifying the gameplay and bonus chances.
Portal Effects in the Free Round
- SPECIAL WILDS: Adds four SPECIAL WILDS to the grid.
- ABYSS: Four SPECIAL WILDS are added, and any win involving a SPECIAL WILD triggers the ABYSS effect (removing symbols in a row/column).
- VOID: Four SPECIAL WILDS appear; wins using a SPECIAL WILD activate the VOID effect (removing all symbols of a randomly chosen type).
Eye Marks and the MEGA WILD Cthulhu
During the Other World Free Round, 11 or 12 Eye Marks are visible on the grid. By forming winning combinations on these spots, you open the eyes. If all Eye Marks are opened in a single feature, the MEGA WILD Cthulhu symbol appears. This symbol moves down the grid with each cascade until it disappears, offering further opportunities for wins as long as cascades continue.
Betting and Controls
- Adjusting Your Bet: Use the plus or minus controls, or select one of five preset bet buttons, to choose your stake—between £0.10 and £5.00 per round.
- Starting the Game: Press the START button (or the spacebar on desktop) to launch a game round with your selected bet. Your outcome is determined by the symbols landing on the grid and the paytable.
- Paytable: You can access the paytable at any time to review symbol values and feature information.
- Auto Adjust Bet: If your balance is not sufficient to support your current bet, the game will automatically lower your stake to the highest available bet for your balance. This bet will remain lowered even if your balance increases later within that round.
Payouts and Game Rounds
- Wins are calculated at the end of each game round.
- If you win on multiple clusters or from features like the Free Round, all winnings are added together for your total payout.
- Winning combinations only count if symbols are directly connected horizontally or vertically, without gaps.
- All wins are based on the stake set for that game round. The stake cannot be changed during an active round.
Game Information and RTP
Cluster wins, features, and bonus rounds are governed by the paytable and game rules, which you can reference at any time during play. The return-to-player (RTP) information is displayed in-game.
Handling Unfinished Games
If you experience an interruption during a game round, your progress and bets are saved. When you return, you may continue from where you left off. Any unresolved bets in incomplete games will become void after 90 days. In the case of a malfunction, all plays and pays are voided.
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Important Note on Tome of Madness Demo & Free Play
Many players search for a Tome of Madness demo or Tome of Madness free play version to see how the slot is structured. As playable demos are not provided here, this page presents the key details instead.
The information highlights the most important elements of Tome of Madness, based directly on the game itself.
This acts as a substitute for demo access, giving you a reliable overview of the slot.
*All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time. Game features mentioned may not be available in some jurisdictions.

