777 Rainbow Respins (Crazy Tooth Studio) Slot Review

777 Rainbow Respins: Slot Overview 

777 Rainbow Respins from Crazy Tooth Studio is a lively and eccentric Irish-themed online slot that blends classic 7s, rainbow motifs, and leprechaun antics with the studio’s trademark experimental gameplay. Released on February 26, 2022, the game serves as a reskinned version of the earlier title 777 Mega Deluxe, but with a distinctly Irish makeover featuring lush green decor, a jolly leprechaun, and a rainbow leading into the reels. Although the theme is familiar in the world of online slots, Crazy Tooth Studio adds a mechanical twist with the Respin Insanity system—an unpredictable respin feature that drives much of the action. 

The layout is far from standard, featuring a 4-reel, 7-row grid that creates 127 fixed paylines, making it stand out from typical slot formats. With a high volatility math model, an RTP of 96.10%, and a hit frequency of 16.10%, the slot delivers bursts of excitement balanced with long stretches of anticipation. The maximum win is not officially listed, though comparable titles suggest potential reaching several thousand times the stake. Whether you’re drawn in by the Irish charm, the reskin curiosity factor, or the thrill of respin mechanics, 777 Rainbow Respins offers a quirky take on classic symbols with modern flair.

Design and Graphics 

The visual presentation of 777 Rainbow Respins combines traditional Irish folklore with Crazy Tooth Studio’s signature neon-bright, glossy finish. The game board is set indoors, decorated with rich green tones, gilded accents, and shimmering patterns that mimic a magical club or enchanted tavern. To the left, a cheerful leprechaun stands atop a pot of gold, reacting to wins and acting as a thematic anchor for the game.The reel layout itself is unique—tall, narrow, and stacked with a blend of classic symbols including 7s, BARs, suns, moons, clubs, hearts, stars, and horseshoes. Bright clover-shaped multiplier wilds marked with “2x” or “5x” add pops of color and energy to the grid. The rainbow that arcs into the reels injects Irish charm, while subtle animations such as sparkles, glow effects, and bouncing symbols provide visual polish. 

During the bonus round, the atmosphere becomes more joyful and dynamic, with locked wild multipliers enhancing the screen’s vibrancy. The overall art direction is whimsical, polished, and unmistakably Crazy Tooth—taking a common theme and giving it a contemporary, high-energy twist. It’s not groundbreaking visually, but it is cohesive, colorful, and cheerful.

Gameplay Mechanics 

At its core, 777 Rainbow Respins revolves around fast-paced respin cycles and cascading symbol combinations. The game’s 127 fixed paylines ensure that wins form frequently across the asymmetrical 4×7 grid. 

Base Symbols 

The lower-paying symbols include: 

Suns 

Horseshoes 

Moons 

Stars 

Clubs 

Hearts 

Diamonds 

These pay between 0.05–0.1× the bet for three or four of a kind. 

The medium symbols—BARs, harps, and rainbows—pay 0.05–0.2× the bet. 

Finally, the 7s serve as high-value symbols, paying up to 0.25× the bet. 

These values are admittedly low, but as is typical for Crazy Tooth Studio slots, the power lies not in base wins but in feature multipliers and respin sequences. 

Wild Multipliers 

The game features 2× multiplier wilds in the base game and 5× multiplier wilds in the bonus. These multiply any win they participate in, dramatically boosting payout potential when combined with respins. 

Hit Frequency and Volatility 

The 16.10% hit frequency means wins occur about once every 6 spins. Combined with high volatility, the game is designed to deliver small hits until the right combination of respins and multipliers aligns. 

Gameplay is straightforward: spin, hope for symbol matches, and pray for Respin Insanity to extend the action beyond single-spin outcomes.

Sound and Music 

The audio design in 777 Rainbow Respins is upbeat and immersive, fitting comfortably within the realm of Irish folklore slots while incorporating the studio’s modern flair. Background tunes include cheerful, festive melodies reminiscent of Irish pub music, blended with rhythmic digital beats that add contemporary energy. The soundtrack evolves subtly depending on the intensity of the reels, becoming more lively during respins and bonus rounds. 

Sound effects punctuate every win, respin, and multiplier activation. Chiming bells, sparkly glitters, and magical swirls emphasize the whimsical nature of the theme. The leprechaun occasionally reacts with gleeful animations and sound cues, adding personality without overwhelming the gameplay. Overall, the audio contributes to a convivial and engaging atmosphere, perfectly suiting the slot’s cheerful charm.

Bonus Features 

777 Rainbow Respins includes two main features: Respin Insanity and the 777 Rainbow Respins Bonus. Both are central to the slot’s excitement, compensating for low symbol values and driving potential win streaks.Respin Insanity 

This is the game’s core mechanic and triggers after any winning spin. 

When activated: 

All instances of the winning symbol are highlighted and brought into the respin area. 

Every symbol inside the respin area—except multiplier wilds—is respun. 

If the respin lands additional matching symbols outside the area, those symbols are added to the respin area. 

The process repeats until no new matching symbols land. 

If a respin occurs with no new symbols, a 2× wild multiplier has a chance to be added to the area before evaluation. 

This mechanic can sometimes extend for several respins, building larger symbol clusters and multiplying the resulting payout, depending on how the wild multipliers interact. 

777 Rainbow Respins Bonus 

Triggered by landing three pot-of-gold scatter symbols, this bonus awards 4 free spins. 

During this feature: 

All winning spins continue to trigger Respin Insanity, creating substantial extension loops. 

A 5× wild multiplier becomes active. 

All wild multiplier symbols become locked for the duration of the bonus. 

This creates a more stable and highly lucrative environment compared to the base game. The bonus cannot be retriggered, so the goal is to maximize the four spins through stacked respins and locked multipliers.

Betting Options and Payouts 

777 Rainbow Respins offers a flexible betting range starting at €0.20 and going up to €40, making it accessible to both budget players and moderate-stakes gamblers. Its RTP of 96.10% sits in a competitive range for high-volatility slots. 

The game’s hit frequency of 16.10% creates a familiar high-risk pattern: long dry spells punctuated by explosive runs when respins chain together, especially during the bonus. The maximum win isn’t explicitly stated, but given similarities to 777 Mega Deluxe, potential around 6,500× the bet is plausible. 

Because of the locked multipliers in the bonus and the chaining nature of Respin Insanity, single-spin outcomes can escalate dramatically—especially when multiple 2× or 5× wilds are involved.

Conclusion 

777 Rainbow Respins is a lively, cheerful slot that blends Irish charm with Crazy Tooth Studio’s unconventional design style. While the theme is undeniably common—leprechauns, rainbows, pots of gold—the mechanics elevate the game beyond a typical Irish-themed title. Respin Insanity is a clever feature that creates satisfying, expanding clusters of matching symbols, and the 777 Rainbow Respins Bonus adds the thrill of locked multipliers and guaranteed respin chains. 

On the downside, symbol values are extremely low, meaning the game relies almost entirely on features to deliver meaningful payouts. The volatility can feel punishing, with long periods of dry spells punctuated by sudden bursts of excitement. Some players may also view the slot as a simple reskin of 777 Mega Deluxe, offering little innovation beyond its visuals. 

Still, for fans of upbeat, colorful slots with engaging respin mechanics, 777 Rainbow Respins delivers plenty of fun. Its charming artistry, lively audio, and high-octane bonus round make it a solid pick for players seeking an Irish-themed game with a modern twist—even if it falls short of being truly groundbreaking.