Oxygen Online Slot: Review

Oxygen, the new product from ELK Studios, is an underwater-themed slot featuring a unique playing field with 6 reels and 7 rows and a Cluster Pays winning mechanism, where symbols must appear in compact groups of a certain number of elements to pay out. The game has an RTP of 94%, slightly below the industry average, however compensated by the great winning potential that can reach up to 25,000 times the player's bet. Oxygen's volatility is rated as medium/high, while betting options are flexible and offer stakes from a minimum of €0.20 to a maximum of €100. So take a breath and prepare for this underwater journey: after all, stocking up on oxygen before a dive is always a good idea!

Theme and Graphics

At first glance, Oxygen appears fun, full of vibrant colors and stylized marine characters that immediately bring a smile. The color palette ranges from deep sea blues to vivid shades of purple, green and orange, just as you'd imagine a tropical marine ecosystem. The underwater setting is enriched with details like corals and seaweed, and the background is the deep blue itself, framed by colorful submerged rocks.

The graphics are polished and modern, and oxygen plays the starring role in the slot, appearing in various forms such as bubbles, whirlpools, and vortexes. These are special symbols encountered during extra features. As for the grid, it's full of icons including various sea creatures like fish and octopi, all characterized by a cartoon style but in an irreverent and funny version. At this precise point in the ocean, marine life has protruding teeth, distorted faces, and crossed arms! For payouts, we report:

• Diver fish pays up to 100x;
• Lanternfish pays up to 50x;
• Seahorse pays up to 30x;
• Green fish pays up to 25x;
• Purple rock pays up to 20x;
• Orange rock pays up to 15x;
• Green rock pays up to 10x.

Bonus Features

Avalanche: in this slot, symbols that are part of a winning Cluster are removed and the remaining symbols fall downward, potentially creating new winning combinations.

Large Symbols: during the game, larger-than-normal symbols can randomly appear, in sizes of 2x2, 3x3, or 4x4. These symbols, occupying more space on the grid, create more frequent winning combinations.

Oxygen Bubble: this icon, which positions itself behind symbols on the reels, ensures that every time a winning combination forms, the value of the multipliers present on the involved symbols doubles, increasing potential wins.

Collector Feature: during spins, this whirlpool-shaped symbol collects all multipliers appearing on the game grid, adding them up and keeping them for subsequent spins. It can become persistent, staying on screen longer, and in that case turns red.

Distributor: when this feature activates, it increases existing multiplier values following a V-shaped pattern. Like the Collector, this feature's value can remain in play between spins and change color when this happens.

Wild Symbols: this slot features various wild symbols:

• X-Blaster Wild, which can randomly select a paying symbol and replace it with other symbols in an X shape on the grid;
• Exploding Wild, which eliminates all paying symbols in its X-shaped area, creating space for possible new combinations;
• Simple Wild, the classic Wild that can substitute any other paying symbol to form winning combinations.

Bonus Game: getting three bonus symbols activates free spins, where all collected multipliers remain in play for the entire duration of the feature. This bonus can be reactivated.

Super Bonus: this is an advanced version of the bonus game. If you get three bonus symbols plus a persistent symbol, you enter the Super Bonus where at least one of the special features, either Collector or Distributor, remains active until the end.

Slots Similar to Oxygen

Those looking for interesting alternatives to Oxygen can try:

• Ocean's Treasure by NetEnt;
• Mystic Ocean Classic by Cristaltec;
• Siren's Kingdom by Iron Dog;
• Starburst by NetEnt;
• Starburst Galaxy by NetEnt.

Pros and Cons of Oxygen Slot

A potential drawback of Oxygen is its RTP (Return to Player) which, set at 94%, is below the industry average. This aspect might influence the choice of players who are more attentive to the relationship between investment and potential return in terms of winnings. Despite everything, since it's always a game of chance that also depends on personal taste, many gamers will certainly love Oxygen for its other interesting features, such as the intelligent multiplier system that can intervene to overcome the payout and RTP issue. After all, if the maximum win is 25,000x, it's clear that there are mechanics in place to achieve it!