Released: 22 May 2020

The game has six reels and rows that can stack up eight levels high across 4096 ways to win. Win outcomes are formed on adjacent reels with at least three symbols of the same kind. Besides the base game action, IO comes with a set of features that can improve the odds for making bigger wins.   

IO  demo

Io Slot Online

ELK Studios have been hard at work to bring out out to outer space with their latest release. The game that's been aptly named IO slot, is an engaging adventure that reminds of Tetris with round symbols, which can form matching clusters on the reels in order to generate win outcomes.

IO Introduction

ELK Studios have enabled a maximum payout of £500,000 or win outcomes that can get as high as that. There is a wild symbol that can substitute for the regular symbols and there is a bonus/scatter that can trigger a free spins feature. There are a couple of additional features that we are going to cover in full in our IO slot review.

IO Design Features

In terms of the graphic design, ELK Studios have inserted all the elements that enable a gameplay that takes place out in space. The reel-set has been placed on a platform that is part of a space-ship, which according to the cinematic intro, launched into outer space from earth. 

IO slots has a background view of a purple planet sitting in the middle of a starry void. This sets the mood for an engaging gameplay that uses classical fruit symbols on the reels, such as sevens, clovers, diamonds, stars and the cards. The symbols may not appear to be much, but the gameplay is dynamic and fun to play.

In some respects, IO has some similarities with the Pulsar slot, but its gameplay is a different ball game.

How to Play IO Slot

The game can start inviting the symbol drops with the push of the Spin button, which can be found in the bottom right corner of the screen. However, before you make the first move on the game, it is best that you scope out the amount of the BET, which can be found in the very bottom right corner, below the said button above.

To change the bet that's been set by the casino as default, simply press the double coin stacks button in the bottom left corner and select one of the available amounts for the bet. The IO slot gives a good range of options that begin with 20p per spin and end with a maximum of £100.00. 

The game has autoplay function which can be turned on and configured by pressing the smaller and faint circular button in the upper right corner. This opens up the menu where the players can choose from the available automatic spins presets, and add optional controls that will enable a hands-free gaming adventure.

Last but not least the menu button can be found in the upper left corner. This is where the players can configure the sound options, toggle on fast spins and view the paytable along with information about the gameplay.

How to Win IO Slots

Winning outcomes in the game can occur when at least three symbols of a same kind have dropped on the reels, starting on the leftmost reel. The matching symbols must occur uninterrupted. The biggest win outcomes come with six matching symbols on adjacent reels, regardless of the position on the row.

The greater the number of rows is, the greater the number of ways to win becomes. The final number of ways to win is 262,144.

In terms of payouts, IO slot offers some amounts that can be appealing. The most valuable symbol on the paytable is the seven, which pays 5x multiplied by the bet. The diamonds pay 1.5x and the clover pays 1x. Obviously, fewer than six symbols pay amounts that are lesser than the wager.

This is where the Avalanche payout system comes in to play, as it can cause multiple winning outcomes resulting from the same spin. 

IO Bonus Features

The game comes with few features. One is the Charged Wild which appears on the reel-set and sticks for the next four win outcomes. Once it expands its four charges, the wild disappears. 

The regular Wild symbol substitutes for any except the bonus symbol. Six wilds in a row brings the biggest payout in the game. 

A third wild symbol is also available, called Wild Forge. This symbol can fill an empty space somewhere on the rows with a multiplier wild symbol. Each time a wild comes into play, the value of the multiplier goes up. 

Lastly, the Laser feature sends a ray of electricity that turns into regular wild symbols each one that is in its path.

Lastly, three bonus symbols trigger the IO free spins bonus feature.

IO Free Play

ELK Studios have released most of their online slots as free play demo slots. These are available at online casinos that host their slots in practice mode.

IO Closing Thoughts

The game has an appealing top payout amount of 5000x, and small symbol payouts that are balanced out by the set of extra features. A medium to high variance is into play and a theoretical RTP of 96%.

Discover the IO slots by claiming a welcome offer right from this page and play at top rated online casinos.

Key Features
  • ProviderELK Studios Group
  • Reels6
  • Min Bet0.10
  • RTP96.00
  • Paylines262144
  • Max Bet100.00
  • Bonus Rounds1
  • VarianceMedium-High
About The Author

Sanja Tasevska


Sanja is our game expert and uses her knowledge to review all kinds of slot games, both old and new. The detailed reviews include the most important info about a particular slot game. She’s been a part of this industry for many years and so far she’s played and given her opinion on thousands of different slot titles. Contact Sanja

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