io.

ELK Studios have brought their exciting gravity mechanics back to the slot reels in this space age adventure game which takes you on an intergalactic journey to a distant moon. Io is one of Jupiter’s finest satellites, and you can explore it for yourself when you fire up the rocket and blast off into outer space! With tumbling symbols that keep you guessing on every spin, and lots of special wilds shaking up those reels, you have the chance to grab some astronomical wins when you play the IO online slot game.

How IO works

The action takes place on a viewing platform in front of the magnificent Io moon, and players will enjoy the scene setting as the radio shares space commands and a funky electro tune, along with laser sounds and more. The transparent reels let you take in the view as you spin.

Players familiar with the Cygnus slot will recognise the unusual format here. The game is played between two large laser pillars, with 6 columns of four symbols stacked four rows each. When a win is made, those winning symbols tumble from the reels, similar to cascade slots, but the round blocks slide down and across to fill the spaces before being joined by an extra row of symbols - up to eight maximum. This can create an incredible 262,144 betways!

The game symbols include J-Q-K-A and some typical casino icons - stars, clovers, diamonds and 7s. They are joined by a host of special symbols which can modify the reels or boost your wins, as follows:

• Wild - stands in for any symbol on a win line

• Charged Wild - has four ‘lives’ before it falls from the reels

• Wild Forge - creates wilds below and drops down to make multipliers

• Lasers - remove symbols, or can intersect and make trails of wilds

Free Drops

In addition to the special symbols above, watch out for the bonus blocks. Three of these will give seven free drops to the player, made on a special reel set which is already fully expanded to eight rows high. During free spins, the Charged Wilds and Wild Forge symbols are sticky, so they lock between spins. New spins can be triggered with further scatters too.

Game stats

Io begins as a 6x4 slot with 4096 betways, though this can quickly rise to 6x8 and 262,144 ways as cascade wins expand the reels. It is a medium to high intensity slot, benefitting from a comfortable 96% RTP and a 5000x maximum win. Spins start at 0.20 each, capped at 100.00. Each spin costs 100 coins, with players setting the value accordingly. Like other ELK Studios slots, players can use one of several ‘bet strategies’ to increase or decrease their stake according to win or loss patterns, or simply play with a fixed stake if preferred. Io is a mobile compatible slot, meaning smartphone and tablet users can enjoy it too.

The game is perfect for casual players and high rollers alike, with a steady pace that blends with big money features. Though the bonus is hard to trigger, the base game action is plenty of fun in itself and some great wins can be achieved here. Make your way to Jupiter’s impressive moon and take a spin on this gravity-themed slot today!