What will you find amongst the sea creatures in the ELK Studios slot game Oxygen? Perhaps gigantic fish, a cascade of wins, Super Bonus Treasure Chests, Exploding Wilds, or maybe even the Multiplier-stuffed Oxygen Bubbles? In the feature-heavy Oxygen slot, you can find all of this and more – all you need to do is dive deep and spin those seven-symbol-tall reels!

Oxygen Bonus Features

ELK Studios are well-known for coming up with crafty features, usually in large numbers for their slots. You only have to look as far as Kaiju or Lake’s Five to see this in action. In Oxygen, there are ten special features and bonuses to discover, ranging from the ever-present Avalanche mechanic to the Super Bonus.

Below, you’ll find the main three big bonus features detailed. However, when you spin the reels of Oxygen, you can seek much more!

Bonus Game

The Bonus Game of the Oxygen slot is triggered by landing three Bonus Chests anywhere on the reels. In the Bonus Game, not only can you retrigger the feature with more Bonus Symbols, but you can also stack Multipliers. Whenever the Oxygen Bubbles appear after winning combinations reveal them, they’ll now remain stuck to the reels. So, you get persistent Multipliers that can also double when more wins land on top of them.

Super Bonus

The Super Bonus comes into play if you land the three scatter symbols, the Bonus Chests, as well as the Persistent Multiplier Feature. This feature can be seen when the Red Spirals land behind any of the symbols on the reels. During the Super Bonus, at least one Multiplier feature remains persistent throughout.


There are three elements to the Multipliers features. Firstly, Oxygen Bubbles can appear behind any symbols and hold Multipliers. When wins happen on top of the Oxygen Bubbles, the Multiplier values double. You can also land the Blue Spirals. These trigger Collector, which amasses all of the visible Multipliers for a potential win. If you hit a Dealer – the Purple Spiral – all Multiplier values in one or more V shapes will be multiplied further.

How to Win on Oxygen

To get a win on the Oxygen slot game, you’ll be looking for clusters rather than payline combinations. As long as five or more of the same symbol are connecting horizontally and vertically, you’ll pop a cluster win. This triggers the Avalanche mechanic to make way for more symbols and, potentially, more wins.

The lowest-paying symbols are the gems. The Green Gems return 0.10 coins when five land in a winning cluster, and up to 10 coins when 14 or more are hit. For the top pays from base symbol combinations, look for the Hiding Octopus. Five of these will return your bet, paying 1 coin, but 14 or more will payout a hefty 100 coins.

How to Play Oxygen

Before you spin the 6x7 reels of the Oxygen slot, you should set your bet. Press the Coin Stack button to the bottom left of the reels. Next, pick one of the preset bet amounts, press the X button to exit, and then hit the Spin button to run the reels once. ELK Studios has mobile-optimised Oxygen, so you’ll be able to spin for the win on Android and iOS devices as well!

Game Info: About Oxygen

A medium-high volatility slot, ELK Studios released Oxygen in December 2023 to join the growing ranks of cascading and cluster pays games in the online slots library. The game is set deep under the waves, with a serene theme to accompany your every spin. All of the symbols are in the deep sea theme. This is particularly helped by the sudden occurrence of Big Symbols – as we always expect to find monsters in the depths. Between spins, the superbly designed cartoonish symbols will even coast around a little bit, which is a nice touch.

More Games from ELK Studios

ELK Studios certainly doesn’t stick to a single theme for long – or even for more than one game! So, whether you want a Hong Kong Xmas game like Ho Ho Tower, crave raving around to the beat in DJ WÏLD, or fancy uncovering South American treasures in Ecuador Gold, you’ll find something for you in their collection.

Similar Slots

If it’s adventures at the bottom of the ocean that you want, why not seek the greatest of deep-sea mythical beasts in Release the Kraken 2? Should you rather avoid the monsters and simply revel in the blue depths, check out the Relax slot game Deep Descent or try to find the crystal balls in Deep Sea Magic: Drop & Lock.
This game is licensed outside of Malta.