Quick verdict: Rich Wilde and the Tome of Insanity is a Play’n GO cluster slot from May 2024, with a 5×5 grid, a 96.20% RTP, medium volatility and a 5,000x max win. Winning symbols charge a Portal that adds wilds and other effects, and a full Portal opens the bonus round.
It is the sequel to Rich Wilde and the Tome of Madness and part of the series that began with Book of Dead.
Demo tested on mobile by Jason Thompson on 8 October 2026: it loaded and worked.
Top-rated casino for Tome of Insanity
Our pick for real-money Tome of Insanity is 1win (9.9/10). It paid our June 2026 crypto withdrawal in a quarter of an hour.
Play at 1win18+. T&Cs apply. Not available in every country. Game libraries vary, so search the lobby for Tome of Insanity.
Tome of Insanity at a glance
| Provider | Play’n GO |
|---|---|
| Released | May 2024 |
| Layout | 5×5 grid, Cluster Pays (4 or more touching symbols) |
| RTP | 96.20% (lower versions exist) |
| Volatility | Medium |
| Bet per spin | 0.10 to 100 |
| Max win | 5,000x your stake |
| Wilds | Book Wilds and Rich Wilde multiplier wilds |
| Bonus | Fill the Portal to start the bonus |
| Bonus buy | None found |
| Mobile | Yes |
How do the wins and cascades work?
Four or more matching symbols touching up, down or sideways make a win. The winning symbols disappear and new ones drop in, so one spin can pay several times. Rich Wilde wilds add a multiplier of x2 to x5 in the base game and x2 to x10 in the bonus; only the highest one counts.
How does the Portal work?
Each winning symbol adds a charge to the Portal next to the grid. Reaching each level triggers an effect.
| Charges | Effect |
|---|---|
| 8 | 2 to 4 Book Wilds |
| 16 | Wilds plus removal of a symbol |
| 30 | Wilds plus an upgrade of the low symbols |
| 48 | The bonus round |
The All-Seeing Eye on the map beside the grid adds 2 to 4 wilds when a win lands on its position.
How does the bonus round work?
There is no scatter. A full Portal starts the Damnation bonus with 3 guaranteed Portal effects, plus one more for every 4 extra winning symbols, up to 7. The round lasts until the effects run out. Opening all 12 regular eyes on the map summons Yog-Sothoth, a 2×2 wild that moves three times, and opening special eyes gives it a x2 to x4 multiplier.
Tome of Insanity vs Tome of Madness
| Feature | Tome of Insanity | Tome of Madness |
|---|---|---|
| Released | May 2024 | June 2019 |
| Layout | 5×5, Cluster Pays | 5×5, Cluster Pays |
| RTP | 96.20% | 96.59% |
| Volatility | Medium | High |
| Max win | 5,000x | 2,000x |
| Big wild | Yog-Sothoth | Cthulhu |
The sequel has a slightly lower RTP and calmer volatility, but its cap is two and a half times higher.
Tips for playing Tome of Insanity
- Long cascades charge the Portal fastest, because each winning symbol adds a charge.
- Overcharging the Portal past 48 adds extra effects to the bonus, up to 7.
- We found no bonus buy listed, so the bonus has to be won in play.
- Check the RTP in the game rules: 96.20% is the top version, and lower ones exist.
Slots like Tome of Insanity
- Book of Dead: the Rich Wilde classic.
- Reactoonz: another Play’n GO cluster slot with a charge meter.
- Legacy of Dead: a Book slot from Play’n GO.
- Book of Shadows: an extreme-volatility Book slot from Nolimit City.
Where to play Tome of Insanity
Casinos with Play’n GO slots list several Rich Wilde games, so check you have opened Tome of Insanity. If you join 1win, the promo code to use is Ultragambler. More on the offer is on our 1win promo code page.
Rich Wilde and the Tome of Insanity FAQs
What is the RTP of Tome of Insanity?
96.20% in the top version, according to Bigwinboard and SlotCatalog. Some casinos use lower versions.
What is the max win in Tome of Insanity?
5,000x your stake, according to Bigwinboard, Casinos.com, PokerListings and OLBG.
How do you trigger the bonus?
Fill the Portal with 48 charges. Each winning symbol adds one charge.
Is it a sequel to Tome of Madness?
Yes. It uses the same 5×5 cluster grid and Portal idea, with Yog-Sothoth in place of Cthulhu.
Can I play Tome of Insanity for free?
Yes. Tome of Insanity has a free-play demo at the top of this page, and it loaded for us on 8 October 2026.
How we checked this
- May 2024 release, 5×5 Cluster Pays, 96.20% RTP, medium volatility, 0.10 to 100 bets and the 5,000x cap: Bigwinboard, SlotCatalog and Casinos.com.
- Multiplier wilds, the All-Seeing Eye, the Portal levels, the Damnation bonus and Yog-Sothoth: Play’n GO, Bigwinboard and SlotCatalog.
- Sources give different eye counts for the Yog-Sothoth multipliers, so we give only the x2 to x4 range. Casinos.com says there is no bonus buy, and the other sources do not mention one.
- Tome of Madness figures: OLBG and PokerListings.
- Figures last checked: 8 October 2026.
Important: check your local laws before you play
Online gambling laws differ from country to country, and in some places it is restricted or not permitted at all. Check that online gambling is legal where you live and that the casino accepts players from your country. You must be 18 or older (or the legal gambling age in your country, if higher). Only gamble with money you can afford to lose.
