Oxygen 2

The game features an underwater theme that immerses players in a vibrant aquatic environment. The colorful symbols appear vibrant and catchy in the blue water background. The theme includes marine creatures like Jellyfish and octopuses.

The background music is pleasant and soothing, keeping you from getting bored while spinning those reels. Also, one of the good things is the sound effects; when the symbols drop, they are flashy and fast. That gave me the feeling that something was happening in the game. Also, the choice of colors from ELK Studios is spot-on; it’s like a treat to the eyes.

Oxygen 2 features an RTP of 94%, which is considered below the industry average for online slots.

The game doesn’t use traditional paylines. Instead, it uses a cluster pays system, where wins are formed by landing at least 5 identical symbols adjacent to each other horizontally or vertically or combining both these patterns.

Like its predecessor, Oxygen 2 is a high-volatility game where the wins can be less frequent but potentially high. Numerous games from ELK Studios, such as the Cygnus and Nitropolis series, exhibit this behavior and have high volatility.

The game uses the Avalanche mechanic and starts with a symbol drop. Winning symbols are collected and exploded; new symbols replace the winning symbols, and if another combination hits, the cycle repeats. If the symbol is a special wild, it is activated to explode later.

The remaining symbols follow Newton’s law of gravitation. For those who are not much into science, it means that they fall vertically until they reach a resting position. The avalanche continues as long as new winning combinations come up. To win, players must align at least 5 identical symbols horizontally or vertically.

The option to automate the spins and choose between 10, 25, 50, or 100 spins is worth mentioning. This allows players to automate spins, sit back, and relax while waiting for those winning combinations.

The slot offers fantastic features, like free spins, multipliers, and bonus rounds. The Bonus Game can be triggered by landing three bonus scatter symbols. Moreover, if three bonus scatter symbols land along with a multiplier feature, they trigger the Super Bonus Game, awarding 10 free drops.

Oxygen Bubbles

Winning symbols explode and activate an Oxygen Bubble or the existing Oxygen Bubble’s multiplier.

Octopus

A win on a position with an Octopus adds random surrounding multipliers to the win.

Jellyfish

The jellyfish stops at a random number of symbol positions, increasing the Oxygen Bubble multipliers and potentially the Jellyfish multiplier.

Blaster Wild

When Blaster Wild explodes, a random payout symbol is selected, and all symbols in either an X shape or a Plus shape from its position are replaced with the selected symbol.

Exploding Wild

The Exploding Wild removes all payout symbols in two cone-shaped areas, either left and right or up and down. The Super Exploding Wild activates any deactivated Oxygen Bubbles behind the removed symbols.