Reef Run

RTP: 96.4%

Dive into Reef Run! Swim with the sea creatures and reel in big wins.

Dive into a high-speed underwater race in Reef Run, a charming and innovative casino game from Yggdrasil Gaming. This title transforms the ocean floor into a vibrant racetrack for a cast of colorful sea creatures. Its main attraction is a unique and exciting Free Spins feature where every win with a specific creature levels it up, boosting a progressive multiplier for huge payout potential. Swim with the sea creatures, race for the finish line, and reel in big wins in this high RTP slot!

Provider: Yggdrasil Gaming
Release Date: 2014
RTP: 96.4%
Volatility: Medium
Max Win: 2,000x
Theme: Underwater / Animals / Racing
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Feature Value
Reels 5
Rows 3
Paylines 20
Min Bet €0.20
Max Bet €40
Max Win 2,000x
Jackpot No
RTP 96.4%
Volatility Medium
Hit Frequency N/A

Thematics and Design: The game is set in a colorful and lively coral reef, which serves as a racetrack for the cute sea creature characters. The design is bright, cheerful, and full of personality, creating a fun and lighthearted atmosphere.

Graphics and animations: The graphics have a charming, high-quality cartoon style that has aged very well. The animations are a highlight, showing the sea creatures racing across the screen during the free spins, which is a unique and engaging visual for a classic slot.

Sound Accompaniment: A bubbly and upbeat tropical soundtrack plays, perfectly suiting the underwater race theme. The sounds of bubbles, cheering sea creatures, and triumphant fanfares when you level up a racer make for a fun and immersive audio experience.

Regular Symbols: The game features six main symbols, all represented by the racing sea creatures: a green snail, a purple crab, a pink shrimp, a blue seahorse, an orange octopus, and a yellow pufferfish. The pufferfish is the most valuable symbol.

Special Symbols:

  • Scatter Symbol: A “Free Spin” pearl is the Scatter. Landing three or more of these triggers the Free Spins feature.

Joining the race is simple. Set your bet, then press ‘Spin’ to start. The main goal is to land 3 or more Scatters to enter the exciting Free Spins race. To see how the progressive multiplier works, we recommend trying the free slot machine demo on our site. The game is perfectly optimized for an underwater derby on any iOS or Android device.

Free Spins Race

This is the main event. Landing 3, 4, or 5 Scatters awards 10, 20, or an incredible 60 free spins, respectively. Before the round starts, you bet on one of the three leading racers (the three highest-paying symbols) for a bonus prize.

During the free spins, the characters race across the bottom of the screen. Every time you land a winning combination with one of the six character symbols, that character’s individual win multiplier increases. The multipliers are:

  • Level 1 (First win): 5x multiplier
  • Level 2 (Second win): 10x multiplier
  • Level 3 (Third win): 20x multiplier

Once a character reaches a multiplier level, all subsequent wins with that character will have that multiplier applied. It’s a thrilling race to level up your highest-paying symbols for epic payouts.


RTP: This is a high RTP slot, with a Return to Player of 96.4%. This is comfortably above the industry average and offers players excellent theoretical value.

Volatility: The game has medium volatility. This makes for a perfectly balanced casino game experience. The base game can provide steady wins, while the Free Spins race feature holds the key to the treasure chest, with the potential for huge wins if you can level up the high-paying symbols.


Reef Run is a wonderfully creative and entertaining slot. The free spins race is an innovative and highly engaging mechanic that provides a fantastic sense of progression and excitement. The theme is charming, and the high RTP and balanced volatility make it a joy to play for long sessions. It’s a classic Yggdrasil title that shows how innovative ideas can create a truly memorable experience.

Pros Cons
✅ Innovative and exciting Free Spins race feature ❌ Max win is relatively low
✅ High RTP of 96.4% ❌ Base game is very simple and lacks features
✅ Balanced medium volatility for all players ❌ Graphics, while charming, are dated compared to new slots
✅ Fun and unique theme

Suitable for: All player types, fans of innovative bonus features, and those who appreciate high RTP slots.


What is the RTP of Reef Run?

The RTP of this slot is a high 96.4%.

Can I play Reef Run for free?

Yes, a demo of this free slot machine is available on our site for you to join the underwater race risk-free.

Does Reef Run have a free spins feature?

Yes, it has a unique Free Spins feature where you race sea creatures. Every win with a creature increases its individual win multiplier up to a maximum of 20x.

What is the maximum win in Reef Run?

The maximum potential win is 2,000 times your total bet.

Is Reef Run mobile-friendly?

Yes, Reef Run is fully optimized with HTML5 to work perfectly on all modern mobile phones and tablets.


  • Golden Fish Tank (Yggdrasil): For players who enjoy the underwater theme and interactive bonus features.
  • Racing Lovers (Yggdrasil): A different sports-themed slot that also has a race-day feel and feature picks.
  • Royal Family (Yggdrasil): A game that also uses a progressive feature system in its bonus round.
  • Flame Busters (Thunderkick): A retro-style slot with a building-fire theme that features a similar “level-up” mechanic in its free spins.
  • Big Bass Bonanza (Pragmatic Play): An iconic fishing-themed slot with its own highly engaging and progressive bonus feature.

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