Return to Player
94%
Minimum bet
0.20
Slot category
Video Slots
Volatility
Low
Reels
6
Progressive jackpot
No
Popularity rating
Maximum bet
100
Game Provider
Elk Studios
Bonus features
Yes
Paylines
Cluster Pays
Theme
Under the Sea
Oxygen 2 online slot game
Sharp artwork, upbeat music, coral-dwelling creatures and a generous range of bonuses are at the heart of Oxygen 2. The game takes players to the deep ridge of Coral Creek, where its inhabitants have machine-like features and keep evolving as their designs shift. In this underwater world, oxygen is exceptionally valuable, as are the prizes tied to putting these creatures to work. ELK Studios’ Oxygen 2 is presented as the provider’s latest trip into an energetic slot setting, with plenty for series fans to discover.
Oxygen 2 at a Glance: Key Slot Facts
- Oxygen 2 has a stated maximum win cap of 25,000x.
- Bonus rounds are included.
- An X-iter bonus buy is available.
- Features include Blaster Wilds, Exploding Wilds and Octopus Multipliers.
Oxygen 2 Slot Graphics and Sound
Casino Ideal’s review finds that Oxygen 2’s audiovisual presentation does not stray far from the original Oxygen, whose design sets a high bar. The grid looks cleaner, with more vivid colours and a brighter overall feel. Pipes, sand, coral and water frame the grid, which takes centre stage.
The review notes that the audio avoids some familiar underwater-slot conventions, though the melodies are pleasant. The beats give the game momentum, and the sound effects reinforce the marine setting. The evolution of this mechanical sea life might even have surprised Darwin.
Top Casinos to Play Oxygen 2:
How to Play the Oxygen 2 Slot Machine
Like its predecessor, Oxygen 2 uses a 6x7 grid, where individual positions can attach to reels and expand to create multiplier opportunities. Its Cluster Pays system does away with conventional symbol lines: clusters pay when five or more matching symbols land next to each other on the reels.
Oxygen 2 keeps its visual style rooted in the underwater theme. Lower-value symbols are brightly coloured floating objects in pink, orange and green, while higher-value symbols show menacing mechanical sea creatures, such as piranhas and crabs.
A five-of-a-kind cluster may pay up to 1x the bet, while clusters of 16+ symbols offer considerably more potential. With the right symbols, the listed payout can reach 100x the bet. The cheerful look comes with the possibility of substantial wins, but no outcome is certain.
| Symbol | 16+ | 13–15 | 10–12 | 8–9 | 6–7 | 5 |
|---|---|---|---|---|---|---|
 | 100x | 10x | 5x | 2.5x | 1.5x | 1x |
 | 50x | 5x | 3x | 1.5x | 0.75x | 0.5x |
 | 30x | 4x | 2.5x | 1.2x | 0.6x | 0.4x |
 | 25x | 3.5x | 2x | 1x | 0.4x | 0.3x |
 | 20x | 3x | 1.5x | 0.8x | 0.25x | 0.2x |
 | 15x | 2.5x | 1.25x | 0.6x | 0.2x | 0.15x |
 | 10x | 2x | 1x | 0.5x | 0.15x | 0.1x |
Wilds substitute for all other paying symbols on the grid. An all-Wild win can pay as much as a comparable cluster made from the highest-paying symbol. During a symbol drop, 2x2, 3x3 or 4x4 symbols may appear anywhere on the grid, sometimes with extra multipliers that boost a winning combination.
Oxygen 2 Slot Demo Version
Oxygen 2 is a brightly designed slot with multipliers and several bonus mechanics. The review suggests trying the demo before staking funds, especially if you want to understand how the game approaches its stated 25,000x maximum win. Free play lets you get familiar with the layout, test feature interactions and consider your staking approach without risking money. It can build familiarity, but no strategy can guarantee a win. Try the demo on the Casino Ideal website before deciding whether to play for real money.
Oxygen 2 Slot Bonus Features
ELK Studios has not packed Oxygen 2 with ten-plus separate bonus features, but the review still considers the selection substantial. Each mechanic is intended to add variety and create opportunities for stronger wins within the game’s rules. Oxygen 2 includes the following bonus features:
Avalanche Feature: After winning symbols pay, they burst and leave room for new symbols to drop into place. The special Wild is the exception: it activates but stays on hold until it explodes later. The avalanche continues until a symbol drop produces no more wins.
Oxygen Bubbles: Oxygen bubbles can appear at random and replace some symbols that have exploded. Each starts with a 1x multiplier, which doubles every time another symbol explodes in the same position. A bubble’s maximum multiplier is 2,048x. Oxygen 2 also has Multiplier Strike, which activates on random wins and adds a random number of multipliers to the reel.
The Jellyfish Multiplier: A jellyfish may appear carrying multipliers that it places at random across the grid. If one multiplier replaces another, its value is added to the existing multiplier.
The Octopus Multiplier: On each spin, one random position is marked with a golden box, with an octopus behind it. If that position is part of a win, the octopus activates and adds a random number of multipliers to the winning cluster, provided those multipliers are already present elsewhere on the grid.
Blaster Wilds: When a Blaster Wild joins a winning cluster, it picks a random paying or Wild symbol from the grid. It then replaces all paying symbols in an ‘X’ or ‘Plus’ pattern with the selected symbol, potentially creating a larger win.
Exploding Wilds: When an Exploding Wild is part of a winning cluster, it makes all paying symbols in two cone-shaped areas extending left, right, up and down from the Wild explode.
Free Spins: The treasure chest is the Scatter symbol, and landing at least three awards 10 free spins. Four Scatters trigger the Super Bonus Game. Both games can retrigger, and the Bonus Game can upgrade to the Super Bonus Game if four Scatters land during the feature.
X-iter: X-iter is the Bonus Buy menu, offering several ways to purchase bonus features and, according to the game information, guarantee certain triggers on the grid. These options may affect feature entry and payout potential, but do not guarantee profit.
Oxygen 2 Slot Strategies
Much of Oxygen 2’s action centres on bonus symbols, so the review characterises play as relatively hands-off. Players can still make considered choices when aiming for larger payouts. These suggestions apply to the game, but no betting system can guarantee profits:
- Compare online casinos carefully: The slot’s RTP is 94%, which the review considers less than especially high. It suggests looking for suitable bonus offers where available, such as those at top online casinos. Read the offer terms before accepting a promotion.
- Manage your bankroll carefully: This is described as a high-volatility slot, so larger wins may take time to arrive. Spreading your bankroll across several bets can help you avoid using all your funds in the first few spins.
Oxygen 2 Technical Details
Oxygen 2 is a 6x7 slot with a 94% RTP and high volatility. Bets range from 0.20 to 100. The stated maximum win is 25,000x. Cluster Pays keeps the format simple, with winning combinations able to pay in every direction.
Best Alternatives to the Oxygen 2 Slot
Once you have explored Coral Creek, there are plenty of other underwater adventures to try. The review suggests these two alternatives for players after a similar ocean setting:
- Bigger Bass Splash: This popular Pragmatic Play title has an RTP of 96.5%, high volatility and a maximum win of 5,000x. The review counts Bigger Bass Splash among the stronger ocean-themed slot choices.
- Muddy Waters: Muddy Waters takes a different approach, sending players into polluted water where discarded objects may hide treasure. This Peter & Sons slot has a 96.49% RTP and a maximum win of 20,000x.
Review Verdict
The review describes Oxygen 2 as an energetic slot, with its pace supported by a wide range of bonus features. Potential wins add to the appeal, though the main criticism is that the game differs little from its predecessor in presentation or bonus design. Choosing between the two may feel much the same. Even so, the Oxygen series brings a distinctive mechanical twist to an underwater setting and offers a variety of features to explore.
Evan Carrington brings more than 12 years of experience in the iGaming industry, with a focus on reviewing online casinos, assessing slot games and examining player safety. Their work covers casino licensing, RTP, volatility, bonus terms and withdrawal policies. Drawing on practical testing and independent research, Evan provides clear, evidence-based reviews to help players understand gambling platforms, their features and possible risks.
