Io Slot Review


Blast off into space and prepare for something fresh and exciting with the Io slot game from the team at ELK Studios. This inter-galactic themed slot takes players on an exciting adventure into the cosmos loaded with bonus features and innovative gameplay mechanics. The slot combines a unique avalanche mechanic with a cluster-pay system to keep players engaged. Buckle up and prepare to find out more in this Io slot review. 

Io Slot Details

The Io slot game takes place in deep space, with an unknown red planet floating behind the reels. The reels themselves are in some sort of teleportation machine. The symbols in the game aren’t too closely linked with the theme, with a selection of stars and clovers accompanying the lower-paying card symbols. The whole design of the slot is fantastic though, and it really stands out from many of the other titles you can find at Mega Casino. 

How To Play Io

Io is a very unique slot game that plays out in a different manner from many other top online slots. The game takes place on a 6-reel 4-row grid, with the reels expanding in height up to eight spots if a good winning avalanche can be secured. This can lead to a whopping 262, 144 different ways to win being active. The slot starts off with 4,096 available. 

Whenever players land a win, the winning symbols disappear and new ones drop down. This is called the Avalanche feature. When this happens, an additional row is added to the grid. An Avalanche finishes when there are no winning combinations left. The grid returns to normal after this. Hitting a good Avalanche sequence can lead to some of the best winning opportunities in the game. 

The coin icon in the bottom left-hand corner allows players to bet between £0.10 and £100. The game can also be played on different devices, with the slot being supported on both mobile and desktop. 

Players can land a maximum win of 5,000x their stake with Io, with the game offering an RTP of 96%. Both of these are strong numbers that are likely to please players. 

Io Slot Game Features

The Io slot game is incredibly innovative, and this approach extends to its great selection of bonus features. 

Bonus Drops 

The Bonus Drops are activated in the game when players land three of the symbols labelled ‘Bonus’. It is also possible to retrigger the drops. During the round, any Charged or Forged Wilds will sit at the bottom of the reels and won’t disappear with the Avalanche feature. 

Charged Wilds 

Charged Wilds can appear on any spins. They are Wild symbols with four lives that will stay on the reel for the duration of those lives. These sit and fall to the bottom of the grid during the Bonus Drops. 

Wild Forge 

A Wild Forge symbol will fill in the empty space below a Wild with a multiplier. This can increase every time the Forged Wild is used. 


When two winning lasers shoot across the grid, if they intercept, they will turn symbols at their intersection point into Wilds. 

Io Verdict

If you’re looking for a slot game that is fit to burst with great bonuses and innovative gameplay, then look no further than Io. ELK Studios has gone all out to create a slot game that is as engaging as it is visually pleasing. The Avalanche mechanic, when used in combinations with the Wild bonuses and the Bonus Drops can lead to some great winning sequences. There are many great space-themed titles at Mega Casino, and Io definitely ranks as one of the best. 


Mega Casino's Top Live Games of 2023

Mega Casino's Top 10 Most Played Live Games of 2023

Discover the most played live casino games of 2023 at Mega Casino 18 + | Play Responsibly

Read More
Best Live Roulette Games at Mega Casino

The Best Live Roulette Games to Try at Mega Casino

Learn about the top live roulette games playable here at Mega Casino. 18 + | Play Responsibly

Read More
Guide to Live Roulette Variationse

A Beginner's Guide to Live Roulette Variations

Learn all about live roulette variations with our beginners guide at Mega Casino 18 + | Play Responsibly

Read More
V: 2.94.1 All rights reserved. January 2020