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100FS
by Riobet Casino
promo code
Casinoz
expert 8.1
Juliya Demko
Expert opinion

Oxygen 2 slot machine was released by ELK Studios in March 2025. In it, users descend to the sea floor and can observe its inhabitants - octopuses, jellyfish, fish. All symbols are interestingly stylized, plus the game is accompanied by pleasant music and fascinating animation. The provider added a lot of bonus features, increasing multipliers and freespins, so that users can not only enjoy spinning the reels, but also the unusual sea world. The game is addictive from the first minutes and, although it requires a lot of time because of the cascading mechanics, the entertainment is worth it.

Type of game Video slots
Manufacturer Elk Studios logo
Theme Adventure, Treasure, Gold, Luck, Action, Nature, Ocean, Jewels, Money, Fish
Min bet 0.20 €
Max bet 100 €
RTP 94%
Max multiplication 25000 : 1
Is free test available Yes
Mobile version Yes
Issue date March 4, 2025
Progressive jackpot No
Reels number 6
Wilds No
Scatter No
Gamble Feature No
Volatility High
3D slot Yes
Respins No
Freespins Yes
Progressive multipliers Yes
Bet line 0.2 - 100
Bonus games Free Spins, Bonus Game, Super Bonus Round, Cascade Win, X-iter

Where to Play Oxygen 2 slot?

Only decent casinos deserve the trust of users. They offer convenient conditions, fast payouts and no altered chances of winning. Running Oxygen 2 slot by ELK Studios at reliable casinos, you can not be afraid of fraud, all data is encrypted and protected.

Play Free Oxygen 2 Slot Demo

To get acquainted with the slot machine there is a demo version. It does not require betting money, credits are used. All other features remain unchanged.

In demo mode you can spin the reels without registration, learning the interface and features of the online slot.

Verified Online casino with Oxygen 2 slot

Casinoz presents top casinos that operate under license and can guarantee users a safe game. In the rating you can learn about the advantages and disadvantages, evaluate the available bonuses, and read reviews from other gamblers.

How to Play Oxygen 2 slot online

The Oxygen 2 online slot has 6 reels with 7 rows each. Such a large field implies the possibility of collecting long chains - 5+ identical symbols touching edges. Such mechanics are called Cluster Pays. The game uses 3 junior and 4 senior kinds of symbols, these are octopuses, fish, snails, etc. Users can expect regular and super freespins, multipliers, special highlighted cells, exploding symbols and purchase bonus of several kinds. The bet per spin can be chosen from 0.2 to 100 euros. The maximum winnings are quite large. It is x25000 of the bet.

Oxygen 2 Symbols, Wild, Scatter

  • Oxygen Bubbles - air bubbles can appear on the field with multipliers. They are activated when a winning combination is hit.

  • Octopus - triggered when you hit a prize chain. The octopus collects all visible multipliers from the reels and applies them to its prize.

  • Jellyfish - Jellyfish can select a random number of cells and add a multiplier to them or increase an existing one.

  • Blaster Wild - replaces all base symbols. Blasts the x-symbols or +-symbols presented in an x-shaped or +-shaped pattern. A random symbol is then selected to be paid for.

  • Exploding Wild - explodes multiple symbols (two cone-shaped spaces) around it, giving you a better chance of a big win.

  • Super Exploding Wild - performs the features of the above symbol, but in addition activates all unused bonuses.

  • Wild Symbol - makes combinations with any standard images on the field.

  • Big Symbol - can be 2x2, 3x3, 4x4 and fall anywhere on the reels.

  • Bonus Symbol is a treasure chest that activates free spins.

  • Wild
    Replacement symbol
  • Bonus
    Activates free spins
  • Red fish
    A high-paying symbol
  • Pink fish
    Average-paying symbol
  • Goldfish
    Average-paying symbol
  • Green fish
    Average-paying symbol
  • Pink buoy
    A low-paid symbol
  • Golden buoy
    A low-paid symbol
  • Green buoy
    A low-paid symbol

Oxygen 2 Bonus games

  • Cascade Symbols. The symbols that make up a prize combination make room for new symbols. Cascades occur during a single spin, allowing for more payouts.

  • X-iter. This is an opportunity to buy bonuses of various kinds. Their value is always a bet multiplier. Bonus Hunt - x3, gives three times the chance to activate freespins. Special Wild - x10, at least three special wilds will fall on a spin. Octo Strike - x25, octopus and air bubble features are guaranteed. Bonus Game - x100, the octopus will be present for 10 free spins. Super Bonus Game - x500, octopus and jellyfish will be constantly present on the field during Free Drops.

Oxygen 2 slot free spins

The free spins round has two types. It can be bought or won. To get Free Drops, you need to stop Bonus symbols on the reel.

  • Bonus Game. Given for three Bonus symbols. The player gets 10 free spins with a guaranteed octopus feature and the constant presence of multiplier bubbles.

  • Super Bonus Game. The trigger for launch is the appearance of 4 Scatter symbols. The user is awarded 10 free spins. They are played with the constant presence of an octopus and the appearance of a jellyfish before each fall of signs.

Bonus rounds are not activated very often, so sometimes it is better to take a risk and buy them, trying to win a large sum.

Oxygen 2 RTP, Volatility & Hit Frequency

  • RTP of the online slot is 94%, so you can't count on stable returns.

  • The volatility of the machine is high, so prizes will be rare but large.

  • Frequency of wins is above average, but most awards are very small.

Comparison Oxygen 2 slot with analogues
Oxygen 2 Buffalo Freedom DoubleMax 7 Fancy Fruits Flaming Link 7s Deluxe Fire Wheel Jackpot King Buffalo Hold And Win Extreme 10000 Dungeon Tower
RTP 94 % 96 % 96.12 % 92.49 % 95.90 % 96.13 %
Volatility High Very high Middle High High High
Lines 243 5 5 25
Drums 6 5 5 3 5 5
Issue date 4 March 2025 2 April 2025 5 March 2025 14 February 2023 13 February 2025 10 October 2022
Progressive jackpot
Scatters
Free Spins
Respins
Progressive multipliers
Jokers
Max payout 25000 25000 12200 50000 12000 20000
Bonus Games

Strategy: How to Win at Oxygen 2 slot

Users should not rely on mathematical strategies that involve lowering and raising the stakes. They can only advise on how to act, but do not guarantee a person constant wins.

Gambling on the chosen system, it is necessary to clearly define your financial limits and do not go beyond the bankroll.

More Elk Studios slot machines
Slot machine RTP Volatility Max win Release date
Cygnus 2 94 % Middle 50000 2 August 2022
Phoenix Graveyard 95 % High 10000 3 May 2022
Birthday 96.30 % Middle 0 23 May 2018
Bloopers 96.10 % 0
Champion’s Goal 95.70 % 300

Oxygen 2 Interface

The Oxygen 2 online slot plunges the user to the sea floor. The game is accompanied by a pleasant light melody and more fun sounds. Bright animation is present during the activation of bonuses - jellyfish floating on the field, octopus moving tentacles, air bubbles burst and illuminated. Watch the process is fascinating, sometimes even forget that there is a game for money.

The first launch of the machine the user is offered a brief introduction to the features. In more detail they can be studied in the menu, there are also presented the rules and symbols are shown. To start the game need:

  1. Select bet size from the available values.

  2. Press the big button to start a spin or "Auto" if you want to play automatically.

  3. Anytime you want to click on the X-iter and choose the appropriate bonus.

The interface of the slot is convenient and simple, users have no questions about the management of the game.

New Elk Studios slots

Mobile Compatibility

The provider has developed a mobile version of the machine for Android and iPhone devices. It has an optimized gameplay that is more convenient for playing on smartphones. The functionality and controls remain the same, so users can buy bonuses and spin the reels in automatic mode.

Other online slot machines

Should You Play Oxygen 2 Slot for Real Money?

The Casinoz editorial team believes that the Oxygen 2 machine is great for long term entertainment. It regularly gives payouts, albeit small, and periodically pleases with large awards. The slot has exciting animation and colorful design, so you can enjoy the beautiful picture.

Frequently asked Questions

🏧 What is the RTP in Oxygen 2?

The rate of return to the player is 94%.

🎲 How many reels and lines are there in the game from ELK Studios?

The online slot offers 6 reels in 7 rows.

👌 What is the maximum bet size in Oxygen 2?

Players can bet a maximum of 100 euros.

Pros
  • There are five purchase bonuses
  • Lots of special symbols that help you get more prizes
  • Multipliers have no limit and can increase the reward by hundreds of times
  • Collecting Octopus Multipliers brings a colossal payout even with a modest combination
  • A cascade of symbols allows you to make dozens of combinations per spin
Cons
  • Cascade slows down gameplay
  • Low percentage of return to player
  • Most chains consist of 5-6 symbols
  • Very low fees for all types of symbols
Juliya Demko
Juliya Demko
Online Slots Expert and Gambling Content Analyst

Yulia — an online slots expert specializing in analyzing slot machines and gaming strategies. Her professional journey began with self-studying slot mechanics and creating freelance reviews, and today she is a key author at Casinoz , where she publishes detailed analyses of online slots. Her work focuses on risk management, game algorithm features, and practical tips for players.

An expert in:
  • online slots
  • game strategy analysis
  • risk management
  • slot machine mechanics
Facts checked Alex Vasilev Scientific editor and fact checker
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Type of game Video slots
Manufacturer Elk Studios logo
Theme Adventure, Treasure, Gold, Luck, Action, Nature, Ocean, Jewels, Money, Fish
Min bet 0.20 €
Max bet 100 €
RTP 94%
Max multiplication 25000 : 1
Is free test available Yes
Mobile version Yes
Issue date March 4, 2025
Progressive jackpot No
Reels number 6
Wilds No
Scatter No
Gamble Feature No
Volatility High
3D slot Yes
Respins No
Freespins Yes
Progressive multipliers Yes
Bet line 0.2 - 100
Bonus games Free Spins, Bonus Game, Super Bonus Round, Cascade Win, X-iter