Lion's Treasure Book Demo & Slot Review

Lion's Treasure Book Review

Lion's Treasure Book is the most recent online slot in the game portfolio of the software developer Mondoplay. It was released at the end of 2025 and is the second title in the provider’s repertoire using the legendary ”Book of ... mechanic”. The first one, Egyptian's Book, was presented in 2024, and now, we have an upgrade. The machine offers a bunch of awesome features and a solid payout potential.

You can give the slot a try via the Lion's Treasure Book free play link above. Or, you can continue with my dedicated review and discover lesser-known facts, tips for optimal play, and all the details in general. Lion's Treasure Book runs smoothly and offers plenty of stake options. It is one of Mondoplay’s games with the highest max wins!

Mondoplay - Slot Developer

Mondoplay is an in-house slot studio, part of the large Italian software producer Mondogaming. The parent company was launched in 2006 and stepped into the field of online slots in 2024. In just a couple of years, Mondoplay released more than 20 titles with premium quality and revised RTP rates. It is audited by iTech Labs and licensed by ADM, ONJN, and MGA. Mondoplay sponsored media events at the 2026 ICE and iGB Affiliate in Barcelona. We at SlotCatalog wait to see what’s next on the provider’s agenda after the Lion's Treasure Book online slot!

Slot Theme And Storyline

The Lion's Treasure Book slot features a cartoonish take on ancient Rome with a lion, a swordsman, and a princess among the high-valued symbols. The action takes place behind castle walls in a scenic garden with fountains and gold lion statues. It is a sunny day, and the overall vibe is lighter compared to Egyptian's Book. All visual elements are richly decorated, and the graphics are of fine quality.

While Egyptian's Book follows the script of Book of Dead by Play’N GO, Lion's Treasure Book is more like Legacy of Dead. That’s due to its bonus mechanics, of course, since the new release is far from being described as an Egyptian-themed game. Overall, Mondoplay has preserved its style to deliver beautiful yet not very vibrant online slots.

Lion's Treasure Book Slot Rules And Gameplay

The Lion's Treasure Book game won’t surprise the fans of the sub-category and offers a standard 5x3 grid with 10 paylines. They are fixed and award cash for combinations, starting from the leftmost reel and continuing to the right. Autoplay and Turbo Spin are available, as well as a Bonus Buy feature. You can see the paylines displayed on both sides of the board.

The Lion's Treasure Book slot provides 12 stake levels between €0.20 and €50 per spin. While the range is limited compared to other slot developers, it remains within the usual limits for Mondoplay. Given the relatively stable volatility, which I experienced during my test, they should be enough for basic strategies, like Martingale-based systems.

Symbols And Paytable

The paytable offers 9 regular symbols, the high-valued of which pay for 2 to 5 of a kind, and the low-valued ones, from 3 to 5. A wild symbol is in play to substitute for all of them, but unlike other “Book of …” slots, it pays nothing if lined up and is not the scatter. I will introduce the bonus symbol later in my Lion's Treasure Book slot review, and for now, let’s check the paytable:

How To Play Lion's Treasure Book Slot At An Online Casino?

The Lion's Treasure Book slot is available in hundreds of casino sites, partnering with Mondoplay. The game was launched a couple of months ago, so it shouldn't be difficult to find it. We have a selection of the best-performing online casinos worth trying out. Once you are ready to go, here are all the basic steps to start:

• Pick a licensed Lion's Treasure Book casino site;
• Log in or create a new account via the application form;
• Complete the basic verification steps and claim a bonus;
• Make a secure deposit and find Lion's Treasure Book;
• Start the game, choose your bet, and spin to win.

Lion's Treasure Book Bonuses And Special Features

Lion's Treasure Book by Mondoplay does not offer too many bonus features and no grid modifiers during the base game. That is not unusual, and most slots with such mechanics don’t offer such features either. This makes the Lion's Treasure Book free spins the main source of income, so you need to stay in play to trigger it. Here is how to do it and what to expect:

Free Spins Bonus

You will need 3 or more scatter symbols to trigger the Lion's Treasure Book bonus round and will get a cash prize and 10 free spins. At the start, the Book will select one of the regularly paying symbols to become the Special Symbol. Whenever it appears in enough numbers, 2 or 3 up to 5, on the reels, it will expand and pay for all 10 lines. There is no need for those symbols to be adjacent, but they act more like scatters.

Free Spins is retriggerable in the same way by landing 3+ scatter symbols. If you are lucky to experience that, the game will add 10 extra rounds to your balance and will select another Special Symbol. You can see all the active Special Symbols on the left side of the grid. Potentially, you can play the slot’s bonus with 9 active Special Symbols for truly gigantic wins!

Gamble Feature

Gamble Feature activates after a base game win equal to or lower than 5,000x the bet. If you decide to risk it, you will have to pick a color - red or black. If you guess correctly, your payout will double, but if not, it will be lost. You can make up to 10 plays in a row during a single Gamble session, but win no more than 10,000x. The feature has a HALVE option, meaning that you will collect half of the prize and gamble the other half only.

Buy Free Spins

Buy Free Spins is your shortcut to the Lion's Treasure Book bonus minigame, but it comes with a price. You will get 3 or more scatters on the following round if you pay 100x the bet. Well, the actual cost is lower, as you will still get the scatter prize at the beginning of Free Spins. Still, there is no guarantee for a profit out of the feature! Keep in mind that in some countries, the Bonus Buy features are prohibited!

Lion's Treasure Book RTP, Volatility And Max Win

The Lion's Treasure Book RTP is lower than usual - 94%, while the levels of volatility are undisclosed at the time of writing. I’m confident they are medium or medium to high based on my experience with the slot. The Hit Frequency is also acceptable, and the lowest possible cash prize is 0.50x. The Lion's Treasure Book max win is solid - 10,000x the bet or up to €500,000.

Lion's Treasure Book Demo Version And Free Play

Find out a free Lion's Treasure Book demo at the top of this page and test the slot with no risk. Try your favorite strategies and see if any will bring the desired results. From my practice and stand as an experienced iGaming reviewer, I can’t guarantee results, no matter the approach. Still, the demo version is the usual first touch to every new online casino game!

Play The Game On Your Mobile

Lion's Treasure Book is not available via a movie app, but the slot is fully compatible with Android and iOS. Mondoplay uses HTML5 technology for all of its content, and that makes it versatile and easy to fit any screen and platform. You can play Lion's Treasure Book game via any browser, although Safari and Chrome deliver optimal results. Make sure to connect to a secure and fast Internet source.

Strategy & Tips For Winning

As I already mentioned, there is no Lion's Treasure Book strategy that works at 100%. However, some approaches will allow you to stay longer in play and increase the odds of triggering the Free Spins bonus. You can start with a low bet and increase it on every non-winning spin. Here are several pieces of advice worth remembering:

• Start with the Lion's Treasure Book free play mode;
• Select only reputable and licensed online casinos;
• Play the Lion's Treasure Book slot machine with a budget;
• Look for casino bonuses and free spins with fair terms;
• Do not overuse the Lion's Treasure Book Bonus Buy feature;
• Avoid risky play and never chase losses.

The 200 Spins Lion's Treasure Book Experience

Lion's Treasure Book proved its technical characteristics during my 200-spin test session. I managed to scoop several tasty wins of above 10x, but the main prize came from the Free Spins bonus. I managed to trigger it just once and won 65.50x the bet. However, the result of my session was negative, and I ended with about a 30% decrease of my initial balance. I played with flat bets, and perhaps a more complex betting strategy would have delivered better results.

Pros And Cons Of Lion's Treasure Book Online Slot

Similar Slots To Try

If you like Lion's Treasure Book by Mondoplay, check out the alternative online slots I listed below:

• Legacy of Dead - a highly volatile slot by Play’N GO with an adjustable RTP rate and a max win of 5,000x. It comes with magnificent audio-visuals, high symbol values, a powerful wild-scatter, and Free Spin with up to 9 Expanding Symbols.
• Pilgrim of Dead - another Play’N GO slot with such mechanics, but with an interesting twist. The first special expanding symbol that lands during Free Spins becomes sticky and remains in place until the end of the bonus.
• Book of Power - a highly volatile variant crafted by Relax Gaming with a max win of 15,000x. It offers Power Bet, Bonus Buy, Free Spins, and Power Free Spins. You can activate multiple special expanding symbols or upgrade them with multipliers.

Final Thoughts

Lion's Treasure Book offers the classic “Book of … “ gameplay with a boosted bonus minigame. Although it doesn’t bring anything new to the table, it’s nice to see that the legend is still on trend. It is intriguing to see how long software providers will continue to base their games on the concepts. It has become a way for some of them, like Mondoplay, to show skill and ambition.

The only drawback of the Lion's Treasure Book slot is the low RTP rate, but the original Legacy of Dead rate isn’t too high either. Moreover, Mondoplay’s variant comes with a max win of doubled size (10,000x), and that’s worth mentioning. The Gamble Feature keeps the gambling nostalgia away, and the nice graphics make the title a nice addition to every slot enthusiast’s catalog!