Slot Review

Fenni & Karu

Our Rating:

93.47% Gold star

Fenni & Karu by Bally Wulff
No, take me back

Visitor Rating:

97% Gold star

Times Played:

2 Times Played

Mladen Gyuzelski | Content Creator

Updated: May 6, 2025

Quick Facts

Provider: ProviderThe Slot Provider is none other than the company who developed the slot. Simply click on the name of the provider to find our more about it!
Date Launched: Date LaunchedThe date when this slot game was launched. 10/03/2025
Theme: ThemeTheme is the general genre that the the slot could be classified as. One of the elements that makes slot games appealing, A nicely planned popular theme can potentially skyrocket the popularity of an online slot! Fantasy, Monsters
Jackpot: JackpotA stand-alone or multi-leveled progressive prize pool that a player can win at a given time, simply by spinning the reels.
Special Symbols: Special SymbolsThe special symbols of a slot are part of its mechanic. Elements such as Wilds, Scatters and regular paying symbols come together to form winning combinations. Bonus, Wilds

Review Summary

Fenni & Karu is an immersive video slot by Bally Wulff that invites players into a spooky and fantastical world full of eerie creatures, monsters, and an underworld setting. Released on March 10, 2025, the game features a 5x3 layout with 10 fixed paylines and offers players the chance to win up to 500x their stake. With a medium volatility and an RTP range from 84.28% to 96.16%, the slot provides a balanced gaming experience that keeps players engaged with its innovative mechanics. Key features like Expanding Symbols, the Nudge Feature, and Wild symbols offer dynamic gameplay, enhancing the chances for big wins. The game’s fantasy theme, complemented by its captivating visuals and eerie soundtrack, creates a unique atmosphere that stands out in the world of online slots. Whether you're a fan of adventure or just looking for an exciting spin, Fenni & Karu delivers a memorable gaming experience.

Slot Information

Return to Player (RTP): Return to Player (RTP)The Return to Player is a statistic that aims to show the player's edge over the casino - the higher this number is the better! We review all slots based on this RTP value so click on the percentage on the right to find our more slots with a similar RTP! 94.03%
Volatility/Variance: Volatility/VarianceVolatility or Variance is meant to describe the winning potential of a slot game: a high volatility will have you win big but no so often, while a low volatility will let you win frequently, but less. Medium
Progressive Slot: Progressive SlotA progressive slot is a slot that keep on growing its total possible winning pool; usually linked by a network of slots. It is also known as a jackpot.
Slot Type: Slot TypeSlots can be categorized as classic, 3D, video slots, etc. Click on the type of slot on the right to see similar types of slots! Video Slot
Rows: RowsPart of the design of the slot, the rows are the horizontal lines that trigger special features when certain paying symbols fall in place.3
Reels: ReelsReels are the vertical lines that are build in the slots architecture; together with the rows they help trigger special winning combinations.5
Paylines: PaylinesPaylines, or betting lines, are the pre-determined links of symbols across the rows and reels of a slot. A slot can have anywhere from just 1 payline or up to thousands paylines! 10
Slot Layout: Slot LayoutThe layout of the slot is the way the slot is built, based on the number of rows, reels and paylines. 5 x 3

Slot Features

Minimum Bet: Minimum BetThe minimum accepted amount that will allow you to spin the reels of this slot game. $0.1
Maximum Bet: Maximum BetThe maximum accepted amount that will allow you to spin the reels of this slot game.$100
Maximum Win: Maximum WinThe total maximum amount that you could win triggering the biggest winning combo. $50000
Progressive Slot: Progressive SlotA progressive slot is a slot that keep on growing its total possible winning pool; usually linked by a network of slots. It is also known as a jackpot.
Auto Play Feature: Auto Play FeatureAuto Play is a built-in function on the slot interface that enables automatic spinning of the slot without the player having to press the Spin button on every spin. Usually, the function can be preset to auto execute a certain number of spins like 20,50, 100, or more. Players can typically define their bet amount and set loss limits before starting Auto Play.
Bonus Buy Feature: Bonus Buy FeatureThis feature enables players to instantly pay for and access the special bonus feature of the slot instead of waiting for a lucky spin in a long spin sequence. This feature has proven to be quite popular among slot players.
Free Spins Feature: Free Spins FeatureFree spins are the most popular feature in online slots today. Usually they are not just a free spinning on the usual gameplay of the slot but are bundled into separate and more exciting feature with special effects and much greater winning potential.
Hold and Spin Feature: Hold and Spin FeatureThe Hold and Spin feature adds an element of control and anticipation to slot gameplay. When triggered, specific reels or symbols are held in place while the remaining reels respin, increasing the chances of forming winning combinations.
Available: Android, IOS, Windows

Pros

  • Unique Theme
  • Medium Volatility
  • Playable on Mobile
  • Demo Version Available

Cons

  • Low RTP Range
  • High Variance
  • Graphics and Theme Might Not Appeal to Everyone

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Screenshots

Fenni & Karu Win

Fenni & Karu Win

Fenni & Karu Paytable

Fenni & Karu Paytable

Fenni & Karu Paytable 2

Fenni & Karu Paytable 2

Fenni & Karu Gamble Round

Fenni & Karu Gamble Round

Fenni & Karu Base Play

Fenni & Karu Base Play

Expert’s Opinion

Mladen

1833 Articles

Fenni & Karu by Bally Wulff is a well-crafted slot that blends unique fantasy elements with engaging features. Its medium volatility provides a balanced gameplay experience, appealing to a wide range of players. The Expanding Symbols and Nudge Feature add excitement, while the RTP range offers a fair return. However, the lack of a free spins round may deter some. Overall, it's a solid slot for those seeking a fresh, atmospheric experience with the potential for solid payouts, though it may not be for those who prefer traditional bonus rounds.

9.35 /10 by Mladen Gyuzelski

More articles by Mladen

Introduction to Fenni & Karu

Fenni & Karu Thumbnail SmallStep into a mystical and eerie adventure with Fenni & Karu, a video slot by Bally Wulff that blurs the boundaries between fantasy and the supernatural. Released in March 2025, this 5-reel, 10-payline game invites players into a dark underworld teeming with mischievous monsters, spooky mushrooms, bats, and ghostly apparitions. With a unique blend of charm and creepiness, Fenni & Karu stands out through its atmospheric design and engaging features, including Expanding Symbols, the Nudge Feature, and a dynamic RTP range. Offering medium variance and a top win of 500x the stake, the slot delivers a thrilling experience for those who dare to explore its haunted depths.

Fenni & Karu Slot Provider

Bally Wulff

Bally Wulff

USA Rated 83.54/100%

59 Casinos | 42 Games

All Casinos
Number of games
42
Country
Germany
Founded
1950
  • Slots

Bally Wulff Games & Entertainment GmbH is a renowned German gaming company with a rich history dating back to 1950. Headquartered in Berlin, the company has established itself as a leading manufacturer of gaming machines, particularly in the German market. Over the decades, Bally Wulff has evolved from producing traditional mechanical slot machines to developing modern video-based gaming solutions. Their commitment to innovation is evident in their transition to computer-operated video multigamblers, starting with the Gamestation series in 2008. In 2022, Bally Wulff became part of the Apex Gaming Group, a Czech-based manufacturer of gaming equipment, further expanding its reach and capabilities in the gaming industry. Despite changes in ownership, Bally Wulff has maintained its focus on producing high-quality gaming machines and continues to be a significant player in the European gaming market.

Fenni & Karu Slot Characteristic:

CharacteristicValue
Paylines10
RTP96.1%
Max Win5000 x bet
Bonus GameYes
Special SymbolsWild Symbols
Paid Symbols10
Free SpinsYes
Reels5
Rows3
Slot Layout5×3
TechnologyHTML5, JS
PlatformsMobile, Desktop, Tablet
Minimum Bet$0.1
Maximum Bet$50

Fenni & Karu Slot Gameplay and Mechanics

Fenni & Karu Base Play

Fenni & Karu is built on a classic 5-reel, 3-row layout with 10 fixed paylines, offering straightforward yet engaging gameplay. Each spin immerses players in a whimsical yet eerie world, where themed symbols like bats, spiders, and ghostly creatures fill the reels. The betting range is accommodating, starting from as low as 0.10 and going up to 100 in various currencies, making it suitable for both casual players and high rollers. With medium variance, the game balances frequent moderate wins with the potential for larger payouts, up to a maximum of 500x your stake.

One of the core mechanics enhancing the gameplay is the Expanding Symbols feature. When triggered, a chosen symbol can expand to cover an entire reel, increasing the chance of landing high-value combinations. Complementing this is the Nudge Feature, which adds a strategic twist by shifting reels slightly to nudge a near-miss into a win. The inclusion of Wild symbols further enhances winning opportunities by substituting for regular symbols. Additionally, the game’s RTP range, which varies from 84.28% to 96.16%, may be adjusted based on jurisdiction or settings, providing a flexible framework that influences gameplay dynamics. Together, these mechanics make Fenni & Karu an entertaining and feature-rich slot that maintains tension and excitement throughout each session.

 

Fenni & Karu Slot RTP

96-97 RTP RangeFenni & Karu features a flexible RTP (Return to Player) range, offering values between 84.28% and 96.16%, depending on the version or settings configured by the operator or jurisdiction. This RTP range introduces variability in the theoretical payout over the long term, meaning players may encounter different return rates based on where and how they play the game. The highest RTP of 96.16% sits around the industry average, providing a fair balance of risk and reward for most players. The inclusion of an RTP range also aligns with the game’s medium volatility, reinforcing the sense of unpredictability and excitement that fits its eerie, fantasy-themed setting.

Fenni & Karu Slot Volatility

High volatility iconFenni & Karu is classified as a medium volatility slot, striking a balanced blend between frequent smaller wins and occasional larger payouts. This makes it appealing to a broad range of players, from those who enjoy steady gameplay with manageable risk to those seeking moments of heightened reward potential. The medium volatility complements the game’s max win of 500x and its feature set—such as Expanding Symbols and the Nudge Feature—ensuring that gameplay remains dynamic and engaging without extreme swings. It's an ideal volatility level for players looking for a mix of entertainment and moderate risk.

Fenni & Karu Slot Betting Range

Fenni & Karu offers a flexible betting range that caters to a wide spectrum of players. With minimum bets starting at 0.10 and maximum bets reaching up to 100 (in $, €, or £), the slot accommodates both conservative players and high rollers alike. This range allows for strategic bankroll management and makes the game accessible whether you're playing casually or aiming for higher-stakes sessions. The fixed 10 paylines mean that all lines are always active, ensuring consistent chances with every spin while simplifying the betting structure.

Fenni & Karu Slot Symbols Explained

Fenni & Karu Paytable Symbol 9

Fenni & Karu features a variety of thematic symbols that reinforce its eerie, fantasy-driven world. The standard symbols are composed of familiar supernatural imagery such as bats, mushrooms, spiders, and ghostly creatures, each intricately illustrated to match the game’s spooky aesthetic. These regular symbols appear across the 5×3 grid and offer payouts based on matching combinations along the 10 fixed paylines. Lower-value symbols are typically stylized card icons, while the higher-value ones are represented by the more elaborate and thematic monster and fantasy characters that reflect the slot's haunted underworld setting.

Fenni & Karu Paytable Symbol 10In addition to the base symbols, Fenni & Karu includes special symbols that elevate the gameplay experience. The Wild symbol plays a pivotal role by substituting for other regular symbols to help form winning combinations, acting as a powerful tool during spins. The slot also features Expanding Symbols, which can stretch vertically across reels under certain conditions to create greater win potential. Complementing these is the Nudge Feature, a clever mechanic that slightly shifts reels to potentially turn near-misses into wins. These special features not only enrich the game's pace but also enhance its winning opportunities, making each spin more suspenseful and engaging.

Fenni & Karu Symbols

Fenni & Karu features a haunting collection of symbols, including bats, mushrooms, spiders, and eerie creatures, all designed to immerse players in its spooky fantasy world.

Fenni & Karu Paytable Symbol 10

x5 = 250.000

x4 = 62.500

x3 = 12.500

Fenni & Karu Paytable Symbol 9

x5 = 62.500

x4 = 12.500

x3 = 5.000

Fenni & Karu Paytable Symbol 8

x5 = 62.500

x4 = 12.500

x3 = 5.000

Fenni & Karu Paytable Symbol 7

x5 = 62.500

x4 = 12.500

x3 = 5.000

Fenni & Karu Paytable Symbol 6

x5 = 62.500

x4 = 12.500

x3 = 5.000

Fenni & Karu Paytable Symbol 5

x5 = 25.000

x4 = 5.000

x3 = 2.500

Fenni & Karu Paytable Symbol 4

x5 = 25.000

x4 = 5.000

x3 = 2.500

Fenni & Karu Paytable Symbol 3

x5 = 25.000

x4 = 5.000

x3 = 2.500

Fenni & Karu Paytable Symbol 2

x5 = 25.000

x4 = 5.000

x3 = 2.500

Fenni & Karu Paytable Symbol 1

x5 = 25.000

x4 = 5.000

x3 = 2.500

Fenni & Karu Slot Free Spins Round

Fenni & Karu offers an exciting Free Spins round, which is triggered by landing a specific combination of symbols on the reels. During this feature, players are awarded a set number of free spins, providing an opportunity to accumulate wins without placing additional bets. The Free Spins round often includes enhanced mechanics, such as expanding symbols or nudging reels, further increasing the potential for larger payouts. This bonus feature adds an extra layer of excitement to the game, offering players the chance to unlock greater rewards while navigating through the spooky underworld of Fenni & Karu.

Fenni & Karu Slot Features

setting

Fenni & Karu is packed with engaging features that enhance the excitement of each spin. One of the standout elements is the Expanding Symbols feature, where certain symbols expand to cover entire reels, increasing the chances of landing significant wins. The Nudge Feature adds another layer of thrill by slightly adjusting the reels after a near-miss, providing a second chance to complete a winning combination. The game also includes Wild symbols, which substitute for other symbols to help create winning combinations. Together, these features make Fenni & Karu a dynamic and rewarding experience, keeping players on the edge of their seats with every spin.

FeatureDescription
Expanding SymbolsCertain symbols expand to cover entire reels, enhancing the chances of forming high-value winning combinations.
Nudge FeatureAfter a near-miss, the reels may nudge slightly, giving players a second chance to complete a winning combination.
Wild SymbolsWild symbols substitute for other regular symbols to help form winning combinations, boosting the overall potential for payouts.
RTP RangeThe game features an RTP range from 84.28% to 96.16%, offering variability in the potential return, depending on jurisdiction and settings.

Fenni & Karu Demo Version

Demo Version Icon

The Fenni & Karu demo version allows players to explore the game’s unique features without risking real money. This free-to-play version provides an excellent opportunity to familiarize oneself with the slot’s mechanics, including its Expanding Symbols, Nudge Feature, and Wild symbols, all within the eerie, fantasy-themed setting. While demo play doesn’t offer real-world rewards, it enables players to enjoy the game’s atmosphere and test different strategies, giving them the confidence to play the full version when they are ready to wager real stakes.

Fenni & Karu Slot Compatible Devices

smartphone

Fenni & Karu is designed with accessibility in mind, ensuring compatibility across a wide range of devices. Whether you prefer playing on a desktop, laptop, or mobile device, the game is fully optimized for seamless gameplay. With its use of HTML5 technology, Fenni & Karu runs smoothly on both iOS and Android devices, offering a responsive experience whether you’re playing on a tablet or smartphone. The game’s crisp graphics and engaging features translate well across all screen sizes, allowing players to enjoy the spooky adventure anywhere, anytime.

 

Frequently Asked Questions (FAQs)

These questions provide concise answers to common queries about Fenni & Karu Slot, ensuring clarity and understanding for players.

What is the RTP of Fenni & Karu?

The Fenni & Karu slot by Bally Wulff offers an RTP (Return to Player) of 96.16%, providing players with a balanced return over extended gameplay sessions. It's important to note that the RTP can vary depending on the version or settings configured by the operator or jurisdiction, ranging from 84.28% to 96.16%

What is the maximum win in Fenni & Karu?

The maximum win in the Fenni & Karu slot by Bally Wulff is 500 times your stake. This potential payout is achievable through the game's features, such as Expanding Symbols, the Nudge Feature, and Wild symbols, which enhance the chances of landing significant winning combinations. The game's medium volatility and RTP range (84.28% to 96.16%) contribute to a balanced gaming experience, offering opportunities for both frequent smaller wins and occasional larger payouts.

How many paylines does Fenni & Karu have?

The Fenni & Karu slot by Bally Wulff features 10 fixed paylines. These paylines are active on every spin, ensuring consistent opportunities to form winning combinations across the 5×3 reel layout. This fixed structure simplifies gameplay, as players don't need to adjust the number of active lines, allowing them to focus on the game's features and strategies.

Does Fenni & Karu Slot Offer a Free Spins Round?

No, the Fenni & Karu slot by Bally Wulff does not include a traditional Free Spins round. While many slots feature a dedicated free spins bonus, this game opts for other engaging mechanics to enhance gameplay. Instead, it incorporates elements like Expanding Symbols, the Nudge Feature, and Wild symbols to create dynamic and rewarding experiences. These features contribute to the game's medium volatility and potential for significant wins, up to 500 times your stake.

Can I play Fenni & Karu on my mobile device?

Yes, Fenni & Karu is fully optimized for mobile play. Developed using HTML5 technology, it ensures smooth and responsive gameplay across various devices, including both iOS and Android smartphones and tablets. Whether you're at home or on the go, you can enjoy the game's immersive features and eerie fantasy theme with ease. The mobile version retains all functionalities of the desktop experience, allowing you to spin the reels, utilize features like Expanding Symbols, the Nudge Feature, and Wild symbols, and potentially win up to 500 times your stake, all from the convenience of your mobile device.

Is there a demo version available for Fenni & Karu?

Yes, a demo version of Fenni & Karu is available for free play. You can experience the game without any registration or download requirements. This allows you to explore the game's features, mechanics, and symbols at your own pace. Simply search for the game's demo version online to start playing.

What are the betting limits in Fenni & Karu?

The Fenni & Karu slot by Bally Wulff offers a flexible betting range, accommodating both casual players and high rollers. The minimum bet starts at 0.10, while the maximum bet can go up to 100, depending on the platform and currency used. This wide range allows players to tailor their wagers to their preferred risk level and bankroll. The game features 10 fixed paylines, meaning all lines are active on every spin, ensuring consistent opportunities to form winning combinations. This structure simplifies gameplay, as players don't need to adjust the number of active lines, allowing them to focus on the game's features and strategies.

What features does Fenni & Karu offer?

Fenni & Karu by Bally Wulff offers a selection of engaging features that enhance the gameplay experience. While the game does not include traditional free spins or a dedicated bonus round, it compensates with innovative mechanics:

  • Expanding Symbols: Certain symbols can expand to cover entire reels, increasing the potential for significant wins.

  • Nudge Feature: After a near-miss, the reels may nudge slightly, providing a second chance to complete a winning combination.

  • Wild Symbols: Wilds substitute for other symbols to help form winning combinations, enhancing the overall payout potential.

  • Gamble Feature: Players have the option to gamble their winnings for a chance to double them, adding an extra layer of excitement to the game.

These features contribute to the game's medium volatility and a maximum win potential of up to 500 times the stake. The absence of traditional bonus rounds is offset by these dynamic mechanics, offering a unique and engaging slot experience.

Where can I play Fenni & Karu?

You can play Fenni & Karu at a variety of online platforms that offer slots from Bally Wulff. These platforms typically support both real-money and demo play, giving you the opportunity to experience the game in a risk-free environment before committing any real funds. To access the game, simply search for reputable casinos or sites that feature Bally Wulff's portfolio and enjoy the game directly through your browser or mobile device.

What is the volatility level of Fenni & Karu?

The Fenni & Karu slot by Bally Wulff is classified as a medium volatility game. This means it offers a balanced combination of frequent smaller wins and the potential for larger payouts, making it suitable for players who prefer a moderate level of risk. With an RTP (Return to Player) of 96.16%, the game provides a fair return over extended play sessions. The medium volatility ensures that players can enjoy a steady flow of wins while still having opportunities for significant rewards.

What symbols should I look out for in Fenni & Karu?

The game features a variety of thematic symbols that align with its eerie, fantasy-driven world. While specific details about each symbol's payout values are not readily available, they typically include:

  • Fenni and Karu: The main characters, often depicted in a detailed, painterly style reminiscent of children's book illustrations.

  • Various Monsters and Creatures: Including bats, spiders, and other fantastical beings that enhance the game's spooky atmosphere.

  • Mushrooms and Ghosts: Additional symbols that contribute to the game's underworld theme.

These symbols appear across the 5×3 grid and offer payouts based on matching combinations along the 10 fixed paylines.

In addition to the standard symbols, Fenni & Karu includes special symbols that enhance the gameplay experience:

  • Wild Symbol: Acts as a substitute for other regular symbols to help form winning combinations.

  • Expanding Symbols: Certain symbols can expand to cover entire reels, increasing the chances of landing significant wins.

  • Nudge Feature: After a near-miss, the reels may nudge slightly, providing a second chance to complete a winning combination.

These special symbols and features contribute to the game's medium volatility and a maximum win potential of up to 500 times the stake.

Concluding Thoughts

In conclusion, Fenni & Karu by Bally Wulff delivers a captivating and spooky gaming experience, blending eerie fantasy elements with innovative features. The medium volatility offers a balanced mix of frequent wins and the potential for larger payouts, making it an enjoyable option for players of all levels. With features like Expanding Symbols, the Nudge Feature, and Wild symbols, the game keeps things exciting, while the RTP range provides a fair opportunity for payouts. While the absence of a traditional free spins feature may be a downside for some, the dynamic gameplay and unique features more than make up for it. Whether you’re playing for fun or aiming for the max win of 500x your stake, Fenni & Karu offers a thrilling, immersive experience that’s sure to engage both casual players and thrill-seekers alike.

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