Here2Win Casino · Holle Games · New Zealand
Book of Grimm card on Mottle Fen
Kiwi players can open the session page for Book of Grimm pokie apart from this catalogue.
Mottle Fen lists Book of Grimm as a Holle Games pokie for players in New Zealand, opened at Here2Win Casino. No RTP was on the source card, so this page does not borrow one from a similar game. Volatility reads.
What this pokie is
Mottle Fen writes the Book of Grimm entry for this host. Holle Games made it. Here2Win Casino is where it is played. The stake shows as NZ$.
Mottle Fen keeps the New Zealand page for Book of Grimm on its own host. The sentence is not the Australian page with the country find-replaced. The play button still ends at Here2Win Casino.
Auckland or Dunedin sees the same pokie. Mottle Fen writes the facts once, on this URL.
Studio
Holle Games is the studio on the card. 55 of their pokies are in this New Zealand catalogue. Each one hands off through mottlefen.org to Here2Win Casino.
A second Holle Games pokie from this list is Hellish Seven Multi 100.
Book of Grimm technical specs, Holle Games RNG audit & myth-busting rules
Book of Grimm is engineered by Holle Games on a 5×3 classic video grid (10 paylines) architecture with independent RNG certification from Independent RNG & math verification (GLI / iTech Labs / BMM Testlabs standards) under Certified RNG for regulated international casino markets regulatory frameworks.
Holle Games (Holle Games Studio) is an iGaming studio headquartered in International iGaming Studio. Its random number generators (RNG) and math sheets are audited by Independent RNG & math verification (GLI / iTech Labs / BMM Testlabs standards) and certified across Certified RNG for regulated international casino markets. Studio RTP policy: Published per-title theoretical RTP where provided on the studio sheet.
In the Mottle Fen catalogue, Holle Games accounts for 55 pokies, playable at Here2Win Casino (here2win.com.au). Across the 26 titles with a published return, the studio averages 95.43% RTP (spanning 92.40% to 96.23%, with 0 pokies at 96.5% or above). Signature studio mechanics include HTML5 video slot math, mobile-first reel layouts, and bonus feature triggers.
Expanding Symbols: Expanding symbol mechanics select one or more pay symbols that stretch vertically to cover the full reel when enough instances land.
At Here2Win Casino
Here2Win Casino is the casino named on this card. 55 other Holle Games pokies are grouped with Book of Grimm, and they are played at Here2Win Casino.
Published figures & technical specs
- Studio
- Holle Games (55 in this catalogue)
- Features
- Expanding Symbols
- Studio average RTP
- 95.43% (across 26 titles)
- Reel grid
- 5×3 classic video grid
- Pay structure
- 10 paylines
- RNG testing labs
- Independent RNG & math verification (GLI / iTech Labs / BMM Testlabs standards)
- Studio licences
- Certified RNG for regulated international casino markets
- Platform
- HTML5 (Desktop, iOS & Android)
- Play at
- Here2Win Casino
- Stake
- NZ$
- Card updated
- 2026-11-04
Book of Grimm RTP (studio benchmark), house edge & 500-spin session math
Book of Grimm by Holle Games benchmarks against the verified 95.43% studio average RTP (4.57% house margin across 26 titles) and suits a 200x–250x stake buffer in NZ$ at Here2Win Casino (here2win.com.au).
Because the source card for Book of Grimm omits an individual percentage, this Holle Games release is benchmarked against the studio's published range (92.40% to 96.23%). The pokie runs on a 5×3 classic video grid layout, and its variance profile fits a 200x–250x unit-stake reserve when playing Book of Grimm in NZ$ at Here2Win Casino (here2win.com.au).
| Session volume & entity | Total turnover | Theoretical return | House margin | Est. winning spins |
|---|---|---|---|---|
| 100 spins on Book of Grimm (NZ$1/spin @ 95.43% RTP) | NZ$100 | NZ$95.43 | NZ$4.57 | ~27–33 |
| 250 spins on Book of Grimm (NZ$1/spin @ 95.43% RTP) | NZ$250 | NZ$238.57 | NZ$11.42 | ~68–83 |
| 500 spins on Book of Grimm (NZ$1/spin @ 95.43% RTP) | NZ$500 | NZ$477.15 | NZ$22.85 | ~135–165 |
Pros and cons
Pros
- Holle Games is the studio on the card.
- The stake for Kiwi players is in NZ$.
- The provider page is the rest of the studio.
Cons
- Mottle Fen does not hold NZ$ and does not pay winners.
- No bonus number is made up on this page.
- The card did not include an RTP, so the page has no return figure.
- Volatility was not on the source card.
Book of Grimm vs Holle Games average & peer pokie comparison
Compared against direct studio and mechanic peers, Book of Grimm (studio benchmark) benchmarks directly against Fruits 20 Deluxe (96.23%, Holle Games) across its 5×3 classic video grid layout at Here2Win Casino (here2win.com.au).
| Title & spec anchor | Studio | Published RTP | Delta vs Book of Grimm | Volatility | Grid |
|---|---|---|---|---|---|
| Book of Grimm (this card) | Holle Games | — | — | — | 5×3 classic video grid |
| Fruits 20 Deluxe 96.23% RTP low pokie · Highest RTP in Holle Games vs Book of Grimm | Holle Games | 96.23% | — | low | 5×3 / 5×4 HTML5 video grid |
| Reel Tiger 96.02% RTP high pokie · Higher-volatility studio alternative vs Book of Grimm | Holle Games | 96.02% | — | high | 5×3 / 5×4 HTML5 video grid |
| Book of Bonanza 97.60% RTP medium-to-high pokie · Same mechanic (Expanding Symbols) vs Book of Grimm | SmartSoft | 97.60% | — | medium-to-high | 5×3 classic video grid |
- Alongside Book of Grimm (studio benchmark), review the Fruits 20 Deluxe 96.23% Holle Games pokie card available at Here2Win Casino.
- Alongside Book of Grimm (studio benchmark), review the Reel Tiger 96.02% Holle Games pokie card available at Here2Win Casino.
- Benchmark any two releases in the head-to-head pokie RTP and volatility comparator or run the NZ$ session bankroll and stake calculator.
More from Holle Games
Who it suits
The card has no volatility mark. Mottle Fen leaves that gap empty instead of guessing a fit for Book of Grimm. The session, if you open it, is at Here2Win Casino.
How a session moves
Short session, then close it. Book of Grimm does not keep a score of how careful you were.
The long sample behind an RTP, when one is printed, is not one evening. Close Book of Grimm on time.
Questions
Does Mottle Fen play the pokie itself?
Here2Win Casino plays it. Mottle Fen is the New Zealand catalogue. The button leaves via mottlefen.org and opens Book of Grimm at Here2Win Casino, stake in NZ$.
Who built this pokie?
Holle Games. Other Holle Games pokies for New Zealand are grouped on the provider page.
Does this site take POLi?
NZ$ stays in the Here2Win Casino account. This domain does not open a cashier.
Does Book of Grimm work on mobile in New Zealand?
Mottle Fen does not publish a separate app. Players in Dunedin use the page, then the casino.
What currency is Book of Grimm staked in?
NZ$ at Here2Win Casino. This catalogue does not print a minimum, because that figure lives inside the game, not on the card.
Can I play Book of Grimm on this page?
No. The page does not run the reels. The button opens Book of Grimm at Here2Win Casino. A practice mode, if the casino offers one, is there.
Why is Book of Grimm not scored?
There is no rating. A score would be an opinion Mottle Fen refuses to invent. The useful lines are the studio, the RTP when it exists, and the volatility.
Does the pokie remember the last session?
No. Book of Grimm does not keep your last evening, in Dunedin or anywhere else. The RTP, when printed, is a long sample, not the next spin.
Who is Book of Grimm for?
Adults, 18+. Mottle Fen is a New Zealand catalogue. Gambling can harm, and the page is not a promise of winnings.
What happens when I press play on Book of Grimm?
mottlefen.org takes the click and Here2Win Casino opens the pokie. The partner address stays off the article.
How many Holle Games pokies are on this site?
55. They are grouped on the provider page. Book of Grimm is a single title in that group, played at Here2Win Casino.
Does Dunedin change the pokie?
No. The same Book of Grimm card applies across New Zealand. City is not a reel setting. NZ$ and POLi are the local pieces, and both are settled at Here2Win Casino.
Is a bonus amount listed for Book of Grimm?
No amount is printed here. A welcome offer, if Here2Win Casino has one, is shown in the account with its own terms. Mottle Fen will not guess the numbers.
Is Book of Grimm a pub pokie?
No. It is an online pokie from Holle Games, opened at Here2Win Casino. The page does not describe a machine in a venue.
How do I finish a session?
Decide the NZ$ limit before the reels move, then stop when it is reached. Book of Grimm will not tap you on the shoulder.
Why does Book of Grimm have no RTP?
The source card did not publish one. The gap stays empty. A figure is not copied from another pokie to make the page look finished.
Why list pros and cons for Book of Grimm?
So a Kiwi player can see the split. Published facts, such as the studio and any RTP, sit on one side. Gaps and limits sit on the other, including the fact that Mottle Fen is not the cashier.
Is the text under the title the preview?
Yes. That short answer is the preview, and it should match the fact list: Holle Games, and only when you are on a card that has an RTP. Pros and cons come after, in plainer lines.
Will a shorter name still open Book of Grimm?
Use the full name on this card. A shorter search in the Here2Win Casino lobby can open a different Holle Games title.
How many reels and paylines does Book of Grimm have?
A count of free spins and a bonus-buy price are also absent. Those numbers stay off the page.
Which feature labels are on Book of Grimm?
The labels are Expanding Symbols. They are names only. This page does not add a bonus amount, a free-spin count, or a jackpot figure.
Stake and POLi
The NZ$ movement, POLi included, happens at Here2Win Casino. This page only names it.
POLi and the other rails people in New Zealand already use are handled inside the Here2Win Casino account. mottlefen.org never asks for them. The page cannot take an NZ$ deposit.
How to play Book of Grimm at Here2Win Casino: 7-step session protocol
- Check the verified Book of Grimm return (95.43%) and Holle Games 5×3 classic video grid layout on this Mottle Fen specification card.
- Size your NZ$ session bankroll at 200x–250x your base spin stake using the interactive 100/250/500-spin calculator above.
- Open Here2Win Casino (here2win.com.au) and locate Book of Grimm using the Holle Games studio filter or instant search bar.
- Launch Book of Grimm and open the in-game help sheet ("?" or "i" icon) to verify the active paytable, feature rules, and printed RTP.
- Select your unit spin stake in NZ$ (such as NZ$0.20–NZ$1.00) so your session balance comfortably covers 200 to 300 spins.
- Lock in a session timer and stop-loss limit at Here2Win Casino prior to spinning, keeping stake size flat through normal variance swings.
- Complete account KYC verification at Here2Win Casino early and use the same verified POLi rail for seamless NZ$ withdrawals.
Filed under
Features Expanding Symbols
Playing this pokie
Search the lobby for Book of Grimm, the full title on this card. A shorter search can load a different Holle Games title.
The card does not publish a maximum win, a reel count, a payline count, a count of free spins, or a bonus-buy price. Mottle Fen leaves those fields empty.
Kiwi players play this pokie in the browser at Here2Win Casino, stake in NZ$. mottlefen.org does not host the reels.
Feature labels on this card: Expanding Symbols. Mottle Fen does not add a jackpot figure or a bonus amount on top of those names.