Reef Run Online Slot


Date Updated:1 Dec 2019

Reef Run is a vibrant and colorful 20-payline online video slot developed by the Yggdrasil Gaming software platform. The game has diverse underwater creatures as well as a scatter symbol that also happens to be the Free Spins symbol.

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Progressive Jackpot: No

Software: Yggdrasil Gaming

Paylines: 20

Reels: 5

RTP: 96.40%

If you are an online video slot enthusiast, then you might have noticed that aquatic-themed games are not at all uncommon in this space. And while those games feature virtually the same aesthetic elements and very little variance, there are those that manage to rise above the surface. Reef Run, a game developed by Yggdrasil Gaming, is one of those games.

Reef Run is a five-reel slot that has 20 fixed paylines and you need to peek behind the reels to get a glimpse of the underwater townscape in the distance. These creatures don’t live under rocks or on the sea bottom. Instead, they reside in some kind of aquatic metropolis.

But before you can pay a visit to this remarkable place, players must adjust their bet first. The “Coin Value” selector alters the coin denomination from 0.01 to 1. “Lines” select the number of active paylines. The “Spin” button starts the game, while the triangle “Au­top­lay­” button turns the reels for a preset number of times uninterrupted. Pressing “Max Bet” selects the highest available wager.

Reef Run is an exceptional take on the tried and trusted underwater theme. When it comes to the aesthetic elements, it is incredibly detailed and gives your eyes a lot to take in on the screen.

At the same time, all of the symbols are 3D, and each has its own animation when involved in a win. One of the primary reasons to play is the free spins bonus round. This has a distinct system where each of the sea creatures gets a progressively bigger multiplier – offering plenty of big win potential.

The reels are transparent, with the city becoming clearer for a second when you spin. In the background, you can hear a lighthearted tune. This is multi-layered and complimented by bubble noises whenever you spin the reels.

All told, there’s certainly nothing fishy about this incredibly remarkable game. The graphics and animations are of premium quality and it’s pleasingly easy to trigger the free spins. Whether you are a grizzled slots veteran or someone who is just looking to pass the time, this slot is definitely worth a try.


There are only six main symbols here and they are all multicolor residents of this undersea city. They are a seahorse, a sea slug, an octopus, a lobster, a crab and a pufferfish. There is no wild symbol here but there is a scatter that is represented by a big “Free Spins” logo.


Free Spins

This feature appears to be pretty easy to trigger and that’s to compensate for the lack of a wild symbol. It’s activated by landing three or more of the Free Spins symbols anywhere in view for which you would receive the following:

  • Three scatters = 10 spins
  • Four scatters = 20 spins
  • Five scatters = 60 spins

When the spins are underway, you would notice that six spaces corresponding to the fishy symbols appear beside the reels. Each time you land a winning combo containing one of those fish, you would increase the multiplier for the next time that combo lands – 5x, 10x and 20x. The symbols that have already been leveled up are marked as such on the reels. Landing two Free Spins symbols within this feature would award two more spins.