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Only the first and the second deposit made within 7 days after the activation of the bonus are taken into account with the offer. Max bonus amount for the first deposit is €300; for the second starting from €15 —€400, for the second starting from €50 — €700. 30x wagering requirements for free spins and 40x for bonuses. The maximum bet allowed when playing with bonus money is of $/C$/€5.

Rules and Gameplay

The gameplay of Oxygen is set in a fascinating underwater world, showcased on a 6×7 grid where wins are awarded through a cluster pays system. Players are invited to explore the depths of the ocean, wagering from $0.20 to $100 per spin. The game introduces an Avalanche feature, where winning symbols disappear, allowing new ones to fill the gaps, potentially creating more wins from a single spin. This innovative mechanic, combined with the game’s unique setting, provides a refreshing gaming experience.

Bonus Features

Oxygen is rich with captivating bonus features that enhance player engagement:

  • Avalanche Feature: Triggers consecutive wins as winning clusters disappear and new symbols fall into place.
  • Special Wilds: Two types of special wilds, Exploding Wilds and X-Blaster Wilds, each offer unique ways to increase winning potential by clearing or transforming symbols.
  • Multiplier Bubbles: Winning positions gain multiplier bubbles, which can increase up to x2048, enhancing subsequent wins.
  • Free Spins and Super Free Spins: Offering players 10 free spins with the potential for additional spins and non-resetting multipliers for even bigger wins.


Each symbol in Oxygen contributes to the underwater narrative:

  • High-Value Symbols: Diverse sea creatures including an octopus wearing a diving helmet and various colored fish.
  • Low-Value Symbols: Gemstones encased in bubbles, in colors matching the aquatic theme.
  • Wilds and Scatters: Play pivotal roles in activating the game’s special features and bonus rounds.


The payout structure in Oxygen is designed to reward clusters of matching symbols, with values increasing for larger clusters:

Symbol 5 Matches 14+ Matches
Octopus in Diving Helmet 1x 100x
Pink Fish 0.5x 50x
Orange Fish 0.4x 30x


Instead of traditional paylines, Oxygen utilizes a cluster pays mechanism, where payouts are awarded for clusters of 5 or more matching symbols. This system, coupled with the game’s Avalanche feature, allows for multiple consecutive wins from a single spin, providing thrilling gameplay and the potential for significant rewards.

Pros & Cons

Pros Cons
Innovative gameplay with unique features such as oxygen bubble multipliers and special wilds. RTP of 94% is below the industry average, which might be a drawback for some players.
High max win potential of 25,000x stake, offering players substantial winning possibilities. High volatility may not suit all players, especially those looking for more frequent wins.
Engaging underwater theme with visually appealing graphics and an immersive soundtrack. Some features and bonus rounds may be complex for new players to understand initially.

Minimum and Maximum Bet

The betting range in Oxygen allows for a wide array of betting strategies, accommodating both casual players and high rollers. The minimum bet is set at $0.20, making it accessible for players with a lower bankroll. On the other end, the maximum bet goes up to $100 per spin, catering to those who seek the thrill of high stakes and the chance for larger payouts.

Game Jackpot

Oxygen boasts a maximum win potential of 25,000 times the player’s stake, presenting a substantial jackpot for lucky players. The game operates with an RTP of 94% and falls into the medium to high volatility category. This combination suggests that while wins may not occur on every spin, the game is designed to offer significant payouts that can be both exciting and rewarding for players willing to navigate the ebbs and flows of its volatility.

About Provider

ELK Studios, the creator of Oxygen, is a well-respected name in the online gaming industry, known for its commitment to innovation, quality, and player engagement. Since its inception in 2012, ELK Studios has consistently released high-quality slot games that push the boundaries of traditional gameplay. Renowned for their popular titles such as Toros and Nitropolis series, ELK Studios has built a reputation for crafting games with unique themes, engaging mechanics, and visually stunning graphics, all while maintaining a player-focused approach to game development.

How To Play

  1. Start by setting your bet level using the game’s interface. You can choose a bet between $0.20 and $100 per spin.
  2. Once your bet is set, initiate a spin either manually by pressing the spin button or by activating the auto-play feature for a predetermined number of spins.
  3. Wins are formed by landing clusters of 5 or more matching symbols. Winning clusters will trigger the Avalanche feature, removing winning symbols and allowing new ones to fall into place.
  4. Keep an eye out for special symbols like the regular Wild, Exploding Wild, and X-Blaster Wild, which can enhance your winning potential by substituting for pay symbols or triggering additional features.
  5. Watch as winning positions are upgraded with oxygen bubble multipliers, increasing your chances for bigger wins on subsequent Avalanches.
  6. Trigger the Free Spins or Super Free Spins rounds by landing 3 or more scatter symbols for additional chances to win big.
  7. Explore the game’s special features and bonus rounds, utilizing the doubling position multipliers and special modifier wilds to maximize your winnings.


Oxygen by ELK Studios is a compelling and innovative slot game that offers a rich and immersive underwater adventure. With its unique blend of engaging mechanics, visually stunning graphics, and a wide betting range, it caters to a diverse audience of slot enthusiasts. Despite its below-average RTP and high volatility, the game’s high max win potential and variety of special features make it a thrilling experience. ELK Studios continues to impress with their dedication to quality and innovation, making Oxygen a must-try for players seeking an exciting and potentially lucrative underwater journey.