RTP 94.00%
Volatility High
Reels 6
Paylines Fixed
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Oxygen 2 Specifications

Launch DateMarch 3rd, 2025
SoftwareElk Studios Software
Game typeVideo slot
ThemeSci-Fi & Futuristic , Underwater & Ocean
RTP94.00%
VolatilityHigh
Reels6
Max Wager (per line)100
Max Jackpot25000
Bet range0.20 – 100.00
Paylines typeFixed
SymbolsWild Symbol, Scatter Symbol
Bonus featuresFree Spins
Progressive JackpotNo
Practice PlayNo
AutoplayYes

Oxygen 2, released on March 4, 2025, is a new video slot developed by Elk Studios. It is a sequel to Oxygen, which was released in 2023. The underwater theme builds on its predecessor’s popularity, introducing enhanced features and mechanics that promise an engaging experience.

About Oxygen 2

Oxygen 2 features a submerged world where marine life has adapted to human debris. The backdrop reveals remnants of a sunken submarine, now home to vibrant corals and sea creatures. The symbols reflect this fusion of nature and machinery.

All the symbols are intricately designed to reflect the underwater theme.

Lower-Paying Symbols

The lower-paying symbols are the green, orange, and pink buoy icons. Five matching symbols in a cluster awards 0.1x the bet, while clusters of 16 or more award up to 10x the bet. ​

Higher-Paying Symbols

The higher-paying symbols include four uniquely designed sea creatures:​

  • Green Snail: This symbol awards 0.2x the bet for a cluster of five, and up to 20x for 16 or more in a cluster.
  • Orange Crab: Clusters of five award 0.3x the bet. 16 or more awards up to 30x the bet.​
  • Pink Fish: A cluster of five pays 0.5x the bet, increasing to 50x for clusters of 16 or more.
  • Red Octopus: This is the most lucrative symbol, awarding 1x the bet for a cluster of five, and up to 100x for clusters of 16 or more. ​

Special Symbols

Oxygen 2 features special symbols that enhance gameplay:​

  • Wild Symbol: The Wild substitutes for all regular symbols to help form winning clusters. Notably, a cluster composed entirely of Wilds pays the same as the highest-paying symbol, the Red Octopus. ​
  • Exploding Wild: If part of a winning cluster, the exploding Wild removes all payout symbols in two cone-shaped areas, either left-right or up-down, potentially creating space for new winning clusters.
  • Blaster Wild: Once active, the Blaster Wild selects a random payout or Wild symbol and replaces all symbols in either an X or plus shape from its position. The selected symbol increases the chances of forming substantial clusters. ​
  • Bonus Symbol: The bonus symbol is the treasure chest. Landing three or more triggers the Free Drops Bonus game.

Technical Features

Oxygen 2 has six reels and includes the cluster pays mechanic, where wins are achieved by landing five or more matching symbols in a cluster. It’s available on desktop and mobile devices from 20p to £100 per spin. The RTP is slightly below the industry average at 94%, with a high volatility rating. The max win in Oxygen 2 is capped at 25,000x the bet.

Oxygen 2 Features

Oxygen 2 boasts features including Avalanches, Multiplier Strike, Oxygen Bubbles, Jellyfish, Octopus, Bkaster Wikds, Exploding Wilds, Bonus Game, Super Bonus Game and X-Tier.

Avalanches

After landing a winning cluster, the symbols explode, allowing new symbols to cascade into the empty spaces. The avalanches continue as long as new winning combinations are formed.

Oxygen Bubbles

When a symbol explodes, it activates an oxygen bubble on its position, starting with a 1x multiplier. Subsequent explosions on these positions double the multiplier value, potentially reaching 2,048x. ​

Multiplier Strike

This feature triggers randomly on any spin, placing random multipliers across the grid. These multipliers enhance the value of winning clusters they are part of. ​

Jellyfish Feature

At random intervals, one or more jellyfish swim across the grid. Each jellyfish stops on a random position, adding its multiplier. If a jellyfish lands on a position with an existing multiplier, the values are combined. ​

Octopus Feature

Occasionally, an octopus may position itself behind a specific symbol on the grid. If a win occurs on its position, the octopus activates, adding random multipliers to the win.

Exploding Wilds and Blaster Wilds

If an Exploding Wild is part of a winning cluster, it removes all pay symbols in two cone-shaped areas extending left-right and up-down from its position. It only triggers when no more wins occur.

When the Blaster Wild is part of a winning cluster, it selects a random pay symbol or wild and replaces all symbols in an X or + pattern.

Bonus Game

Landing three bonus symbols triggers the free drop bonus game, and ten free spins. Any existing multipliers are carried over and remain persistent throughout the bonus game. The octopus becomes persistent, moving to a new random position during each free drop.

Super Bonus Game

The Super Bonus triggers with four bonus symbols awarding ten free spins. The Jellyfish feature triggers on every free spin. This guarantees consistent multipliers, significantly boosting the potential for substantial wins. ​

X-iter Feature

X-iter offers various feature buys. For 3x bet each spin is three times more likely to trigger a bonus. 500x the bet triggers the Super Bonus with a guaranteed Octopus and Jellyfish feature in each free drop.

Conclusion​

Oxygen 2 takes us on a deep-sea adventure in a captivating underwater world packed with dynamic features. ELK Studios has developed a dynamic and engaging slot with cascading wins, powerful multipliers, and a variety of special symbols. The cluster pays mechanic, combined with the Octopus and Jellyfish multipliers, ensure the game remains exciting. However, the high volatility means big wins will be few and far between. In true Elk style, the RTP is lower than the industry average, but the 25,000x max win makes the risk worthwhile for those who enjoy high-stakes slots.

Oxygen 2 is now available at many online casinos in the UK.

 

Becky M.
Founder & Editor-in-Chief at Slotfruit

Rebecca (Becky) Mosley has been at the heart of the UK online gambling industry since 2008 – making her one of the most experienced voices in the space. She founded Take Marketing Limited and built SlotFruit.co.uk into one of the longest-running independent casino comparison sites in the country.

As editor-in-chief, Becky brings a genuine player-first perspective to everything on the site. She personally oversees every casino review and slot guide, making sure readers get straight-talking, honest information rather than marketing fluff. Her approach has always been the same: transparency, fair bonus terms, and responsible gambling above all else.

Over 17 years in the industry, Becky has built deep expertise across UK Gambling Commission licensing, slot game mechanics, bonus structures, and the constantly evolving regulatory landscape. She works directly with operators and software providers to keep every listing accurate and up to date.

Becky is a Companies House registered director (Take Marketing Limited, company no. 07619813) and is based in Lincolnshire, England.

The numbers on Oxygen 2

RTP 94.00%
Higher than 5% of the 5,730 slots we hold a figure for
Where you can play it 23 casinos we have confirmed carry it
More widely stocked than 78% of the slots we track
Volatility High Not better or worse, just how the wins are spread. Higher means rarer but bigger.
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The numbers on Oxygen 2

RTP 94.00%
Higher than 5% of the 5,730 slots we hold a figure for
Where you can play it 23 casinos we have confirmed carry it
More widely stocked than 78% of the slots we track
Volatility High Not better or worse, just how the wins are spread. Higher means rarer but bigger.